256048939 has 4 divisors (see below), whose sum is σ = 257479560. Its totient is φ = 254618320.

The previous prime is 256048889. The next prime is 256048973. The reversal of 256048939 is 939840652.

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

It is a cyclic number.

It is not a de Polignac number, because 256048939 - 2¹⁵ = 256016171 is a prime.

It is a super-2 number, since 2×256048939² = 131122118326051442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256048979) 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, 715042 + ... + 715399.

It is an arithmetic number, because the mean of its divisors is an integer number (64369890).

Almost surely, 2^256048939 is an apocalyptic number.

256048939 is a deficient number, since it is larger than the sum of its proper divisors (1430621).

256048939 is a wasteful number, since it uses less digits than its factorization.

256048939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430620.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 256048939 is about 16001.5292706666. The cubic root of 256048939 is about 635.0008795739. Note that the first 3 decimals are identical.

It can be divided in two parts, 25604 and 8939, that added together give a palindrome (34543).

The spelling of 256048939 in words is "two hundred fifty-six million, forty-eight thousand, nine hundred thirty-nine".