256760730 has 72 divisors (see below), whose sum is σ = 697994388. Its totient is φ = 65480448.

The previous prime is 256760717. The next prime is 256760759. The reversal of 256760730 is 37067652.

It is a happy number.

256760730 is a `hidden beast` number, since 2 + 567 + 60 + 7 + 30 = 666.

256760730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 245329569 + 11431161 = 15663^2 + 3381^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44914 + ... + 50306.

Almost surely, 2^256760730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256760730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348997194).

256760730 is an abundant number, since it is smaller than the sum of its proper divisors (441233658).

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

256760730 is a wasteful number, since it uses less digits than its factorization.

256760730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452 (or 5426 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 256760730 is about 16023.7551778602. The cubic root of 256760730 is about 635.5887486105.

The spelling of 256760730 in words is "two hundred fifty-six million, seven hundred sixty thousand, seven hundred thirty".