256345074 has 192 divisors, whose sum is σ = 679311360. Its totient is φ = 71850240.

The previous prime is 256345073. The next prime is 256345081. The reversal of 256345074 is 470543652.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256345073) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3610459 + ... + 3610529.

It is an arithmetic number, because the mean of its divisors is an integer number (3538080).

Almost surely, 2^256345074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256345074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339655680).

256345074 is an abundant number, since it is smaller than the sum of its proper divisors (422966286).

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

256345074 is a wasteful number, since it uses less digits than its factorization.

256345074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 256345074 is about 16010.7799310340. The cubic root of 256345074 is about 635.2455900024.

The spelling of 256345074 in words is "two hundred fifty-six million, three hundred forty-five thousand, seventy-four".