56663428 has 12 divisors (see below), whose sum is σ = 101841292. Its totient is φ = 27565920.

The previous prime is 56663393. The next prime is 56663437. The reversal of 56663428 is 82436665.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49308484 + 7354944 = 7022^2 + 2712^2 .

It is a super-2 number, since 2×56663428² = 6421488145422368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191283 + ... + 191578.

Almost surely, 2^56663428 is an apocalyptic number.

It is an amenable number.

56663428 is a deficient number, since it is larger than the sum of its proper divisors (45177864).

56663428 is a wasteful number, since it uses less digits than its factorization.

56663428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382902 (or 382900 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 56663428 is about 7527.5114081614. The cubic root of 56663428 is about 384.0911332456.

The spelling of 56663428 in words is "fifty-six million, six hundred sixty-three thousand, four hundred twenty-eight".