56983905 has 40 divisors (see below), whose sum is σ = 111443904. Its totient is φ = 27626400.

The previous prime is 56983879. The next prime is 56983909. The reversal of 56983905 is 50938965.

56983905 is a `hidden beast` number, since 569 + 83 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 56983905 - 2⁸ = 56983649 is a prime.

It is a super-4 number, since 4×56983905⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (56983909) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 1941 + ... + 10850.

Almost surely, 2^56983905 is an apocalyptic number.

56983905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56983905 is a deficient number, since it is larger than the sum of its proper divisors (54459999).

56983905 is a wasteful number, since it uses less digits than its factorization.

56983905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12819 (or 12810 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 56983905 is about 7548.7684426004. The cubic root of 56983905 is about 384.8138865448.

The spelling of 56983905 in words is "fifty-six million, nine hundred eighty-three thousand, nine hundred five".