56740399 has 4 divisors (see below), whose sum is σ = 56904264. Its totient is φ = 56576536.

The previous prime is 56740381. The next prime is 56740417. The reversal of 56740399 is 99304765.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56740381) and next prime (56740417).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56740399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56740319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81412 + ... + 82105.

It is an arithmetic number, because the mean of its divisors is an integer number (14226066).

Almost surely, 2^56740399 is an apocalyptic number.

56740399 is a deficient number, since it is larger than the sum of its proper divisors (163865).

56740399 is a wasteful number, since it uses less digits than its factorization.

56740399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163864.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 56740399 is about 7532.6223189537. The cubic root of 56740399 is about 384.2649696649.

The spelling of 56740399 in words is "fifty-six million, seven hundred forty thousand, three hundred ninety-nine".