56081986 has 4 divisors (see below), whose sum is σ = 84122982. Its totient is φ = 28040992.

The previous prime is 56081959. The next prime is 56081999. The reversal of 56081986 is 68918065.

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

It can be written as a sum of positive squares in only one way, i.e., 33281361 + 22800625 = 5769^2 + 4775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14020495 + ... + 14020498.

Almost surely, 2^56081986 is an apocalyptic number.

56081986 is a deficient number, since it is larger than the sum of its proper divisors (28040996).

56081986 is a wasteful number, since it uses less digits than its factorization.

56081986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28040995.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 56081986 is about 7488.7906900914. The cubic root of 56081986 is about 382.7728521515.

The spelling of 56081986 in words is "fifty-six million, eighty-one thousand, nine hundred eighty-six".