256607748 has 18 divisors (see below), whose sum is σ = 648647454. Its totient is φ = 85535904.

The previous prime is 256607723. The next prime is 256607759. The reversal of 256607748 is 847706652.

It can be written as a sum of positive squares in only one way, i.e., 143568324 + 113039424 = 11982^2 + 10632^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3563961 + ... + 3564032.

Almost surely, 2^256607748 is an apocalyptic number.

It is an amenable number.

256607748 is an abundant number, since it is smaller than the sum of its proper divisors (392039706).

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

256607748 is a wasteful number, since it uses less digits than its factorization.

256607748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128003 (or 7127998 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 256607748 is about 16018.9808664596. The cubic root of 256607748 is about 635.4624923415.

The spelling of 256607748 in words is "two hundred fifty-six million, six hundred seven thousand, seven hundred forty-eight".