256881692 has 12 divisors (see below), whose sum is σ = 455875056. Its totient is φ = 126631680.

The previous prime is 256881689. The next prime is 256881697. The reversal of 256881692 is 296188652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256881697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451973 + ... + 452540.

It is an arithmetic number, because the mean of its divisors is an integer number (37989588).

Almost surely, 2^256881692 is an apocalyptic number.

It is an amenable number.

256881692 is a deficient number, since it is larger than the sum of its proper divisors (198993364).

256881692 is a wasteful number, since it uses less digits than its factorization.

256881692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904588 (or 904586 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 256881692 is about 16027.5291919871. The cubic root of 256881692 is about 635.6885432275.

The spelling of 256881692 in words is "two hundred fifty-six million, eight hundred eighty-one thousand, six hundred ninety-two".