256342374 has 64 divisors (see below), whose sum is σ = 589248000. Its totient is φ = 82559520.

The previous prime is 256342369. The next prime is 256342399. The reversal of 256342374 is 473243652.

256342374 is a `hidden beast` number, since 2 + 563 + 4 + 23 + 74 = 666.

It is a super-2 number, since 2×256342374² = 131422825415911752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193687 + ... + 195005.

It is an arithmetic number, because the mean of its divisors is an integer number (9207000).

Almost surely, 2^256342374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256342374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294624000).

256342374 is an abundant number, since it is smaller than the sum of its proper divisors (332905626).

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

256342374 is a wasteful number, since it uses less digits than its factorization.

256342374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1444 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 256342374 is about 16010.6956126210. The cubic root of 256342374 is about 635.2433597156.

The spelling of 256342374 in words is "two hundred fifty-six million, three hundred forty-two thousand, three hundred seventy-four".