256481424 has 40 divisors (see below), whose sum is σ = 736197920. Its totient is φ = 85493664.

The previous prime is 256481419. The next prime is 256481429. The reversal of 256481424 is 424184652.

256481424 is a `hidden beast` number, since 2 + 5 + 648 + 1 + 4 + 2 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (256481419) and next prime (256481429).

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

It is not an unprimeable number, because it can be changed into a prime (256481429) 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, 296422 + ... + 297285.

It is an arithmetic number, because the mean of its divisors is an integer number (18404948).

Almost surely, 2^256481424 is an apocalyptic number.

256481424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256481424 is an abundant number, since it is smaller than the sum of its proper divisors (479716496).

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

256481424 is a wasteful number, since it uses less digits than its factorization.

256481424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593724 (or 593712 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 256481424 is about 16015.0374336122. The cubic root of 256481424 is about 635.3581991278.

It can be divided in two parts, 25648 and 1424, that added together give a palindrome (27072).

The spelling of 256481424 in words is "two hundred fifty-six million, four hundred eighty-one thousand, four hundred twenty-four".