256746752 has 18 divisors (see below), whose sum is σ = 512491098. Its totient is φ = 128373248.

The previous prime is 256746739. The next prime is 256746757. The reversal of 256746752 is 257647652.

It can be written as a sum of positive squares in only one way, i.e., 220938496 + 35808256 = 14864^2 + 5984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256746757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501203 + ... + 501714.

Almost surely, 2^256746752 is an apocalyptic number.

It is an amenable number.

256746752 is a deficient number, since it is larger than the sum of its proper divisors (255744346).

256746752 is an equidigital number, since it uses as much as digits as its factorization.

256746752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002933 (or 1002919 counting only the distinct ones).

The product of its digits is 705600, while the sum is 44.

The square root of 256746752 is about 16023.3190069973. The cubic root of 256746752 is about 635.5772146287.

The spelling of 256746752 in words is "two hundred fifty-six million, seven hundred forty-six thousand, seven hundred fifty-two".