256193900 has 36 divisors (see below), whose sum is σ = 565068000. Its totient is φ = 100795200.

The previous prime is 256193897. The next prime is 256193963. The reversal of 256193900 is 9391652.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14900 + ... + 27099.

Almost surely, 2^256193900 is an apocalyptic number.

256193900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256193900 is an abundant number, since it is smaller than the sum of its proper divisors (308874100).

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

256193900 is a wasteful number, since it uses less digits than its factorization.

256193900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42074 (or 42067 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 256193900 is about 16006.0582280585. The cubic root of 256193900 is about 635.1206913008.

The spelling of 256193900 in words is "two hundred fifty-six million, one hundred ninety-three thousand, nine hundred".