56018405 has 4 divisors (see below), whose sum is σ = 67222092. Its totient is φ = 44814720.

The previous prime is 56018399. The next prime is 56018429. The reversal of 56018405 is 50481065.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 22829284 = 5761^2 + 4778^2 .

It is a de Polignac number, because none of the positive numbers 2^k-56018405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601836 + ... + 5601845.

It is an arithmetic number, because the mean of its divisors is an integer number (16805523).

Almost surely, 2^56018405 is an apocalyptic number.

It is an amenable number.

56018405 is a deficient number, since it is larger than the sum of its proper divisors (11203687).

56018405 is a wasteful number, since it uses less digits than its factorization.

56018405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11203686.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 56018405 is about 7484.5444083124. The cubic root of 56018405 is about 382.6281456521.

The spelling of 56018405 in words is "fifty-six million, eighteen thousand, four hundred five".