256742734 has 8 divisors (see below), whose sum is σ = 385182288. Its totient is φ = 128348640.

The previous prime is 256742729. The next prime is 256742749. The reversal of 256742734 is 437247652.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14854 + ... + 27094.

It is an arithmetic number, because the mean of its divisors is an integer number (48147786).

Almost surely, 2^256742734 is an apocalyptic number.

256742734 is a deficient number, since it is larger than the sum of its proper divisors (128439554).

256742734 is a wasteful number, since it uses less digits than its factorization.

256742734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22730.

The product of its digits is 282240, while the sum is 40.

The square root of 256742734 is about 16023.1936267400. The cubic root of 256742734 is about 635.5738990885.

The spelling of 256742734 in words is "two hundred fifty-six million, seven hundred forty-two thousand, seven hundred thirty-four".