256326156 has 72 divisors (see below), whose sum is σ = 665945280. Its totient is φ = 83091456.

The previous prime is 256326151. The next prime is 256326173. The reversal of 256326156 is 651623652.

It is a happy number.

256326156 is a `hidden beast` number, since 2 + 5 + 6 + 32 + 615 + 6 = 666.

256326156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 256326156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256326151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 332940 + ... + 333708.

It is an arithmetic number, because the mean of its divisors is an integer number (9249240).

Almost surely, 2^256326156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256326156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332972640).

256326156 is an abundant number, since it is smaller than the sum of its proper divisors (409619124).

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

256326156 is a wasteful number, since it uses less digits than its factorization.

256326156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1018 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 256326156 is about 16010.1891306755. The cubic root of 256326156 is about 635.2299627966.

The spelling of 256326156 in words is "two hundred fifty-six million, three hundred twenty-six thousand, one hundred fifty-six".