256622454 has 96 divisors (see below), whose sum is σ = 650467584. Its totient is φ = 72325440.

The previous prime is 256622453. The next prime is 256622459. The reversal of 256622454 is 454226652.

256622454 is a `hidden beast` number, since 25 + 6 + 622 + 4 + 5 + 4 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256622453) 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, 167737 + ... + 169259.

It is an arithmetic number, because the mean of its divisors is an integer number (6775704).

Almost surely, 2^256622454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256622454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325233792).

256622454 is an abundant number, since it is smaller than the sum of its proper divisors (393845130).

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

256622454 is a wasteful number, since it uses less digits than its factorization.

256622454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1599 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 256622454 is about 16019.4398778484. The cubic root of 256622454 is about 635.4746314045.

The spelling of 256622454 in words is "two hundred fifty-six million, six hundred twenty-two thousand, four hundred fifty-four".