56140186 has 4 divisors (see below), whose sum is σ = 84210282. Its totient is φ = 28070092.

The previous prime is 56140157. The next prime is 56140187. The reversal of 56140186 is 68104165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68104165 = 5 ⋅13620833.

It can be written as a sum of positive squares in only one way, i.e., 32433025 + 23707161 = 5695^2 + 4869^2 .

It is a super-2 number, since 2×56140186² = 6303440968229192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (56140187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14035045 + ... + 14035048.

Almost surely, 2^56140186 is an apocalyptic number.

56140186 is a deficient number, since it is larger than the sum of its proper divisors (28070096).

56140186 is a wasteful number, since it uses less digits than its factorization.

56140186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28070095.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 56140186 is about 7492.6754901037. The cubic root of 56140186 is about 382.9052159744.

The spelling of 56140186 in words is "fifty-six million, one hundred forty thousand, one hundred eighty-six".