56781186 has 48 divisors (see below), whose sum is σ = 142669632. Its totient is φ = 14747040.

The previous prime is 56781161. The next prime is 56781191. The reversal of 56781186 is 68118765.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505 + ... + 10668.

It is an arithmetic number, because the mean of its divisors is an integer number (2972284).

Almost surely, 2^56781186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56781186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71334816).

56781186 is an abundant number, since it is smaller than the sum of its proper divisors (85888446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56781186 is a wasteful number, since it uses less digits than its factorization.

56781186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11207 (or 11196 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 56781186 is about 7535.3291898895. The cubic root of 56781186 is about 384.3570220159.

The spelling of 56781186 in words is "fifty-six million, seven hundred eighty-one thousand, one hundred eighty-six".