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1990852848 = 243213825367
BaseRepresentation
bin111011010101010…
…0000000011110000
312010202010210200200
41312222200003300
513034124242343
6525314515200
7100222653465
oct16652400360
95122123620
101990852848
1193186a236
12476895b00
132595c3a4a
1414c59766c
15b9ba74d3
hex76aa00f0

1990852848 has 30 divisors (see below), whose sum is σ = 5571623304. Its totient is φ = 663617568.

The previous prime is 1990852817. The next prime is 1990852849. The reversal of 1990852848 is 8482580991.

It is a super-2 number, since 2×19908528482 = 7926990124779422208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990852794 and 1990852803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990852849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6912540 + ... + 6912827.

Almost surely, 21990852848 is an apocalyptic number.

1990852848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1990852848 is an abundant number, since it is smaller than the sum of its proper divisors (3580770456).

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

1990852848 is a wasteful number, since it uses less digits than its factorization.

1990852848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13825381 (or 13825372 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The square root of 1990852848 is about 44618.9740805411. The cubic root of 1990852848 is about 1257.9973325930.

The spelling of 1990852848 in words is "one billion, nine hundred ninety million, eight hundred fifty-two thousand, eight hundred forty-eight".

Divisors: 1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 13825367 27650734 41476101 55301468 82952202 110602936 124428303 165904404 221205872 248856606 331808808 497713212 663617616 995426424 1990852848