256881898 has 48 divisors (see below), whose sum is σ = 487880064. Its totient is φ = 98781120.

The previous prime is 256881853. The next prime is 256881907. The reversal of 256881898 is 898188652.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248643 + ... + 249673.

It is an arithmetic number, because the mean of its divisors is an integer number (10164168).

Almost surely, 2^256881898 is an apocalyptic number.

256881898 is a deficient number, since it is larger than the sum of its proper divisors (230998166).

256881898 is a wasteful number, since it uses less digits than its factorization.

256881898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1090 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 55.

The square root of 256881898 is about 16027.5356184287. The cubic root of 256881898 is about 635.6887131524.

The spelling of 256881898 in words is "two hundred fifty-six million, eight hundred eighty-one thousand, eight hundred ninety-eight".