256749044 has 24 divisors (see below), whose sum is σ = 460521600. Its totient is φ = 125181504.

The previous prime is 256749041. The next prime is 256749047. The reversal of 256749044 is 440947652.

It is an interprime number because it is at equal distance from previous prime (256749041) and next prime (256749047).

It is a junction number, because it is equal to n+sod(n) for n = 256748992 and 256749010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256749041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179717 + ... + 181139.

It is an arithmetic number, because the mean of its divisors is an integer number (19188400).

Almost surely, 2^256749044 is an apocalyptic number.

It is an amenable number.

256749044 is a deficient number, since it is larger than the sum of its proper divisors (203772556).

256749044 is a wasteful number, since it uses less digits than its factorization.

256749044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 256749044 is about 16023.3905276006. The cubic root of 256749044 is about 635.5791059070.

The spelling of 256749044 in words is "two hundred fifty-six million, seven hundred forty-nine thousand, forty-four".