256413722 has 4 divisors (see below), whose sum is σ = 384620586. Its totient is φ = 128206860.

The previous prime is 256413719. The next prime is 256413733. The reversal of 256413722 is 227314652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 162537001 + 93876721 = 12749^2 + 9689^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64103429 + ... + 64103432.

Almost surely, 2^256413722 is an apocalyptic number.

256413722 is a deficient number, since it is larger than the sum of its proper divisors (128206864).

256413722 is a wasteful number, since it uses less digits than its factorization.

256413722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128206863.

The product of its digits is 20160, while the sum is 32.

The square root of 256413722 is about 16012.9235931481. The cubic root of 256413722 is about 635.3022901975.

The spelling of 256413722 in words is "two hundred fifty-six million, four hundred thirteen thousand, seven hundred twenty-two".