398681256 has 32 divisors (see below), whose sum is σ = 1049162400. Its totient is φ = 125899200.

The previous prime is 398681243. The next prime is 398681267. The reversal of 398681256 is 652186893.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436695 + ... + 437606.

It is an arithmetic number, because the mean of its divisors is an integer number (32786325).

Almost surely, 2^398681256 is an apocalyptic number.

It is an amenable number.

398681256 is an abundant number, since it is smaller than the sum of its proper divisors (650481144).

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

398681256 is a wasteful number, since it uses less digits than its factorization.

398681256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874329 (or 874325 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 398681256 is about 19967.0041818997. The cubic root of 398681256 is about 735.9956925157.

The spelling of 398681256 in words is "three hundred ninety-eight million, six hundred eighty-one thousand, two hundred fifty-six".