256406016 has 40 divisors (see below), whose sum is σ = 683085744. Its totient is φ = 85468160.

The previous prime is 256406011. The next prime is 256406039. The reversal of 256406016 is 610604652.

It is not an unprimeable number, because it can be changed into a prime (256406011) 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, 81930 + ... + 85001.

Almost surely, 2^256406016 is an apocalyptic number.

It is an amenable number.

256406016 is an abundant number, since it is smaller than the sum of its proper divisors (426679728).

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

256406016 is an equidigital number, since it uses as much as digits as its factorization.

256406016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166952 (or 166936 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 256406016 is about 16012.6829731935. The cubic root of 256406016 is about 635.2959258885.

The spelling of 256406016 in words is "two hundred fifty-six million, four hundred six thousand, sixteen".