256415445 has 48 divisors (see below), whose sum is σ = 522168192. Its totient is φ = 114756480.

The previous prime is 256415443. The next prime is 256415447. The reversal of 256415445 is 544514652.

256415445 is a `hidden beast` number, since 2 + 5 + 641 + 5 + 4 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (256415443) and next prime (256415447).

It is not a de Polignac number, because 256415445 - 2¹ = 256415443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256415443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13489 + ... + 26358.

It is an arithmetic number, because the mean of its divisors is an integer number (10878504).

Almost surely, 2^256415445 is an apocalyptic number.

It is an amenable number.

256415445 is an abundant number, since it is smaller than the sum of its proper divisors (265752747).

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

256415445 is a wasteful number, since it uses less digits than its factorization.

256415445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39882 (or 39879 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 256415445 is about 16012.9773933519. The cubic root of 256415445 is about 635.3037131887.

The spelling of 256415445 in words is "two hundred fifty-six million, four hundred fifteen thousand, four hundred forty-five".