256913448 has 64 divisors (see below), whose sum is σ = 702820800. Its totient is φ = 77614080.

The previous prime is 256913431. The next prime is 256913453. The reversal of 256913448 is 844319652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97168 + ... + 99776.

It is an arithmetic number, because the mean of its divisors is an integer number (10981575).

Almost surely, 2^256913448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256913448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351410400).

256913448 is an abundant number, since it is smaller than the sum of its proper divisors (445907352).

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

256913448 is a wasteful number, since it uses less digits than its factorization.

256913448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002 (or 2998 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 256913448 is about 16028.5198318497. The cubic root of 256913448 is about 635.7147369894.

The spelling of 256913448 in words is "two hundred fifty-six million, nine hundred thirteen thousand, four hundred forty-eight".