256764458 has 8 divisors (see below), whose sum is σ = 385400928. Its totient is φ = 128297484.

The previous prime is 256764451. The next prime is 256764493. The reversal of 256764458 is 854467652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256764451) 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, 38516 + ... + 44687.

It is an arithmetic number, because the mean of its divisors is an integer number (48175116).

Almost surely, 2^256764458 is an apocalyptic number.

256764458 is a deficient number, since it is larger than the sum of its proper divisors (128636470).

256764458 is a wasteful number, since it uses less digits than its factorization.

256764458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84748.

The product of its digits is 1612800, while the sum is 47.

The square root of 256764458 is about 16023.8715047269. The cubic root of 256764458 is about 635.5918247084.

The spelling of 256764458 in words is "two hundred fifty-six million, seven hundred sixty-four thousand, four hundred fifty-eight".