256994424 has 32 divisors (see below), whose sum is σ = 713874000. Its totient is φ = 85664736.

The previous prime is 256994411. The next prime is 256994429. The reversal of 256994424 is 424499652.

It is a super-2 number, since 2×256994424² = 132092267934183552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256994424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256994429) 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, 594679 + ... + 595110.

Almost surely, 2^256994424 is an apocalyptic number.

256994424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256994424 is an abundant number, since it is smaller than the sum of its proper divisors (456879576).

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

256994424 is a wasteful number, since it uses less digits than its factorization.

256994424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189804 (or 1189794 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 256994424 is about 16031.0456302763. The cubic root of 256994424 is about 635.7815198294.

The spelling of 256994424 in words is "two hundred fifty-six million, nine hundred ninety-four thousand, four hundred twenty-four".