56403938 has 4 divisors (see below), whose sum is σ = 84605910. Its totient is φ = 28201968.

The previous prime is 56403931. The next prime is 56403953. The reversal of 56403938 is 83930465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83930465 = 5 ⋅16786093.

It can be written as a sum of positive squares in only one way, i.e., 53246209 + 3157729 = 7297^2 + 1777^2 .

It is not an unprimeable number, because it can be changed into a prime (56403931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14100983 + ... + 14100986.

Almost surely, 2^56403938 is an apocalyptic number.

56403938 is a deficient number, since it is larger than the sum of its proper divisors (28201972).

56403938 is a wasteful number, since it uses less digits than its factorization.

56403938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28201971.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 56403938 is about 7510.2555216184. The cubic root of 56403938 is about 383.5039212186.

The spelling of 56403938 in words is "fifty-six million, four hundred three thousand, nine hundred thirty-eight".