256334442 has 64 divisors (see below), whose sum is σ = 633394944. Its totient is φ = 67345920.

The previous prime is 256334423. The next prime is 256334467. The reversal of 256334442 is 244433652.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172342 + ... + 173822.

It is an arithmetic number, because the mean of its divisors is an integer number (9896796).

Almost surely, 2^256334442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256334442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316697472).

256334442 is an abundant number, since it is smaller than the sum of its proper divisors (377060502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256334442 is a wasteful number, since it uses less digits than its factorization.

256334442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823.

The product of its digits is 69120, while the sum is 33.

The square root of 256334442 is about 16010.4479012925. The cubic root of 256334442 is about 635.2368075380.

The spelling of 256334442 in words is "two hundred fifty-six million, three hundred thirty-four thousand, four hundred forty-two".