56870405 has 4 divisors (see below), whose sum is σ = 68244492. Its totient is φ = 45496320.

The previous prime is 56870353. The next prime is 56870413. The reversal of 56870405 is 50407865.

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 36204289 + 20666116 = 6017^2 + 4546^2 .

It is not a de Polignac number, because 56870405 - 2¹⁰ = 56869381 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, 5687036 + ... + 5687045.

It is an arithmetic number, because the mean of its divisors is an integer number (17061123).

Almost surely, 2^56870405 is an apocalyptic number.

It is an amenable number.

56870405 is a deficient number, since it is larger than the sum of its proper divisors (11374087).

56870405 is a wasteful number, since it uses less digits than its factorization.

56870405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11374086.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 56870405 is about 7541.2469128122. The cubic root of 56870405 is about 384.5582271832.

It can be divided in two parts, 56870 and 405, that added together give a palindrome (57275).

The spelling of 56870405 in words is "fifty-six million, eight hundred seventy thousand, four hundred five".