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199939072 = 210195253
BaseRepresentation
bin10111110101011…
…01010000000000
3111221012221211211
423322231100000
5402141022242
631501215504
74645311514
oct1372552000
9457187754
10199939072
11a2951203
1256b61594
1332565658
141c7a8144
1512846317
hexbead400

199939072 has 22 divisors (see below), whose sum is σ = 399684938. Its totient is φ = 99969024.

The previous prime is 199939063. The next prime is 199939073. The reversal of 199939072 is 270939991.

It can be written as a sum of positive squares in only one way, i.e., 158155776 + 41783296 = 12576^2 + 6464^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199939073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96603 + ... + 98650.

Almost surely, 2199939072 is an apocalyptic number.

It is an amenable number.

199939072 is a deficient number, since it is larger than the sum of its proper divisors (199745866).

199939072 is an equidigital number, since it uses as much as digits as its factorization.

199939072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195273 (or 195255 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 199939072 is about 14139.9813295492. The cubic root of 199939072 is about 584.7441567603.

The spelling of 199939072 in words is "one hundred ninety-nine million, nine hundred thirty-nine thousand, seventy-two".

Divisors: 1 2 4 8 16 32 64 128 256 512 1024 195253 390506 781012 1562024 3124048 6248096 12496192 24992384 49984768 99969536 199939072