56409387 has 4 divisors (see below), whose sum is σ = 75212520. Its totient is φ = 37606256.

The previous prime is 56409337. The next prime is 56409391. The reversal of 56409387 is 78390465.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56409387 - 2⁸ = 56409131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56409307) 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, 9401562 + ... + 9401567.

It is an arithmetic number, because the mean of its divisors is an integer number (18803130).

Almost surely, 2^56409387 is an apocalyptic number.

56409387 is a deficient number, since it is larger than the sum of its proper divisors (18803133).

56409387 is a wasteful number, since it uses less digits than its factorization.

56409387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803132.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 56409387 is about 7510.6182834704. The cubic root of 56409387 is about 383.5162705075.

The spelling of 56409387 in words is "fifty-six million, four hundred nine thousand, three hundred eighty-seven".