256498668 has 36 divisors (see below), whose sum is σ = 676563888. Its totient is φ = 81781920.

The previous prime is 256498637. The next prime is 256498673. The reversal of 256498668 is 866894652.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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, 154063 + ... + 155718.

Almost surely, 2^256498668 is an apocalyptic number.

It is an amenable number.

256498668 is an abundant number, since it is smaller than the sum of its proper divisors (420065220).

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

256498668 is a wasteful number, since it uses less digits than its factorization.

256498668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309814 (or 309809 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 256498668 is about 16015.5757935829. The cubic root of 256498668 is about 635.3724378085.

The spelling of 256498668 in words is "two hundred fifty-six million, four hundred ninety-eight thousand, six hundred sixty-eight".