56780409 has 8 divisors (see below), whose sum is σ = 86522560. Its totient is φ = 32445936.

The previous prime is 56780401. The next prime is 56780413. The reversal of 56780409 is 90408765.

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

It is not a de Polignac number, because 56780409 - 2³ = 56780401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56780401) 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, 1351894 + ... + 1351935.

It is an arithmetic number, because the mean of its divisors is an integer number (10815320).

Almost surely, 2^56780409 is an apocalyptic number.

It is an amenable number.

56780409 is a deficient number, since it is larger than the sum of its proper divisors (29742151).

56780409 is a wasteful number, since it uses less digits than its factorization.

56780409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703839.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 56780409 is about 7535.2776325760. The cubic root of 56780409 is about 384.3552688133.

The spelling of 56780409 in words is "fifty-six million, seven hundred eighty thousand, four hundred nine".