256470730 has 16 divisors (see below), whose sum is σ = 462457800. Its totient is φ = 102408192.

The previous prime is 256470701. The next prime is 256470749. The reversal of 256470730 is 37074652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 254434401 + 2036329 = 15951^2 + 1427^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16455 + ... + 27994.

Almost surely, 2^256470730 is an apocalyptic number.

256470730 is a deficient number, since it is larger than the sum of its proper divisors (205987070).

256470730 is a wasteful number, since it uses less digits than its factorization.

256470730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45033.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 256470730 is about 16014.7035564196. The cubic root of 256470730 is about 635.3493685792.

The spelling of 256470730 in words is "two hundred fifty-six million, four hundred seventy thousand, seven hundred thirty".