56672405 has 4 divisors (see below), whose sum is σ = 68006892. Its totient is φ = 45337920.

The previous prime is 56672401. The next prime is 56672411. The reversal of 56672405 is 50427665.

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 33651601 + 23020804 = 5801^2 + 4798^2 .

It is not a de Polignac number, because 56672405 - 2² = 56672401 is a prime.

It is a super-2 number, since 2×56672405² = 6423522976968050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56672401) 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, 5667236 + ... + 5667245.

It is an arithmetic number, because the mean of its divisors is an integer number (17001723).

Almost surely, 2^56672405 is an apocalyptic number.

It is an amenable number.

56672405 is a deficient number, since it is larger than the sum of its proper divisors (11334487).

56672405 is a wasteful number, since it uses less digits than its factorization.

56672405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11334486.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 56672405 is about 7528.1076639485. The cubic root of 56672405 is about 384.1114156050. Note that the first 3 decimals are identical.

The spelling of 56672405 in words is "fifty-six million, six hundred seventy-two thousand, four hundred five".