56400786 has 96 divisors (see below), whose sum is σ = 139426560. Its totient is φ = 16982784.

The previous prime is 56400733. The next prime is 56400787. The reversal of 56400786 is 68700465.

It is a happy number.

56400786 is a `hidden beast` number, since 5 + 640 + 0 + 7 + 8 + 6 = 666.

It is a super-2 number, since 2×56400786² = 6362097322835592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56400786.

It is not an unprimeable number, because it can be changed into a prime (56400787) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 499066 + ... + 499178.

It is an arithmetic number, because the mean of its divisors is an integer number (1452360).

Almost surely, 2^56400786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56400786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69713280).

56400786 is an abundant number, since it is smaller than the sum of its proper divisors (83025774).

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

56400786 is a wasteful number, since it uses less digits than its factorization.

56400786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 56400786 is about 7510.0456722979. The cubic root of 56400786 is about 383.4967773505.

The spelling of 56400786 in words is "fifty-six million, four hundred thousand, seven hundred eighty-six".