56387409 has 8 divisors (see below), whose sum is σ = 80966592. Its totient is φ = 34699920.

The previous prime is 56387399. The next prime is 56387413. The reversal of 56387409 is 90478365.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56387409 - 2⁴ = 56387393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56387489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722877 + ... + 722954.

It is an arithmetic number, because the mean of its divisors is an integer number (10120824).

Almost surely, 2^56387409 is an apocalyptic number.

It is an amenable number.

56387409 is a deficient number, since it is larger than the sum of its proper divisors (24579183).

56387409 is a wasteful number, since it uses less digits than its factorization.

56387409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445847.

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

The square root of 56387409 is about 7509.1550123832. The cubic root of 56387409 is about 383.4664560117.

The spelling of 56387409 in words is "fifty-six million, three hundred eighty-seven thousand, four hundred nine".