56855405 has 4 divisors (see below), whose sum is σ = 68226492. Its totient is φ = 45484320.

The previous prime is 56855401. The next prime is 56855437. The reversal of 56855405 is 50455865.

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 22714756 + 34140649 = 4766^2 + 5843^2 .

It is not a de Polignac number, because 56855405 - 2² = 56855401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56855401) 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, 5685536 + ... + 5685545.

It is an arithmetic number, because the mean of its divisors is an integer number (17056623).

Almost surely, 2^56855405 is an apocalyptic number.

It is an amenable number.

56855405 is a deficient number, since it is larger than the sum of its proper divisors (11371087).

56855405 is a wasteful number, since it uses less digits than its factorization.

56855405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371086.

The product of its (nonzero) digits is 120000, while the sum is 38.

The square root of 56855405 is about 7540.2523167332. The cubic root of 56855405 is about 384.5244141620.

The spelling of 56855405 in words is "fifty-six million, eight hundred fifty-five thousand, four hundred five".