256873724 has 6 divisors (see below), whose sum is σ = 449529024. Its totient is φ = 128436860.

The previous prime is 256873717. The next prime is 256873741. The reversal of 256873724 is 427378652.

It is a super-2 number, since 2×256873724² = 131968220163256352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32109212 + ... + 32109219.

It is an arithmetic number, because the mean of its divisors is an integer number (74921504).

Almost surely, 2^256873724 is an apocalyptic number.

It is an amenable number.

256873724 is a deficient number, since it is larger than the sum of its proper divisors (192655300).

256873724 is a wasteful number, since it uses less digits than its factorization.

256873724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64218435 (or 64218433 counting only the distinct ones).

The product of its digits is 564480, while the sum is 44.

The square root of 256873724 is about 16027.2806177467. The cubic root of 256873724 is about 635.6819705278.

The spelling of 256873724 in words is "two hundred fifty-six million, eight hundred seventy-three thousand, seven hundred twenty-four".