256603044 has 12 divisors (see below), whose sum is σ = 598740464. Its totient is φ = 85534344.

The previous prime is 256603043. The next prime is 256603069. The reversal of 256603044 is 440306652.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (256603043) 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, 10691782 + ... + 10691805.

Almost surely, 2^256603044 is an apocalyptic number.

It is an amenable number.

256603044 is an abundant number, since it is smaller than the sum of its proper divisors (342137420).

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

256603044 is a wasteful number, since it uses less digits than its factorization.

256603044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21383594 (or 21383592 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 256603044 is about 16018.8340399668. The cubic root of 256603044 is about 635.4586093283.

Adding to 256603044 its reverse (440306652), we get a palindrome (696909696).

The spelling of 256603044 in words is "two hundred fifty-six million, six hundred three thousand, forty-four".