256772424 has 32 divisors (see below), whose sum is σ = 652458240. Its totient is φ = 84187200.

The previous prime is 256772413. The next prime is 256772429. The reversal of 256772424 is 424277652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256772429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86232 + ... + 89159.

It is an arithmetic number, because the mean of its divisors is an integer number (20389320).

Almost surely, 2^256772424 is an apocalyptic number.

256772424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256772424 is an abundant number, since it is smaller than the sum of its proper divisors (395685816).

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

256772424 is a wasteful number, since it uses less digits than its factorization.

256772424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175461 (or 175457 counting only the distinct ones).

The product of its digits is 188160, while the sum is 39.

The square root of 256772424 is about 16024.1200694453. The cubic root of 256772424 is about 635.5983976224.

The spelling of 256772424 in words is "two hundred fifty-six million, seven hundred seventy-two thousand, four hundred twenty-four".