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199996680 = 233513128203
BaseRepresentation
bin10111110101110…
…11010100001000
3111221022212212110
423322323110020
5402144343210
631502342320
74645641462
oct1372732410
9457285773
10199996680
11a2990514
1256b8a9a0
1332585940
141c7c1132
1512858420
hexbebb508

199996680 has 64 divisors (see below), whose sum is σ = 646148160. Its totient is φ = 49229568.

The previous prime is 199996639. The next prime is 199996681. The reversal of 199996680 is 86699991.

It is a super-2 number, since 2×1999966802 = 79997344022044800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199996680.

It is not an unprimeable number, because it can be changed into a prime (199996681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62542 + ... + 65661.

It is an arithmetic number, because the mean of its divisors is an integer number (10096065).

Almost surely, 2199996680 is an apocalyptic number.

199996680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199996680 is an abundant number, since it is smaller than the sum of its proper divisors (446151480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199996680 is a wasteful number, since it uses less digits than its factorization.

199996680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128230 (or 128226 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 199996680 is about 14142.0182435181. The cubic root of 199996680 is about 584.8003117117.

The spelling of 199996680 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 78 104 120 130 156 195 260 312 390 520 780 1560 128203 256406 384609 512812 641015 769218 1025624 1282030 1538436 1666639 1923045 2564060 3076872 3333278 3846090 4999917 5128120 6666556 7692180 8333195 9999834 13333112 15384360 16666390 19999668 24999585 33332780 39999336 49999170 66665560 99998340 199996680