56188890 has 96 divisors (see below), whose sum is σ = 159606720. Its totient is φ = 14183424.

The previous prime is 56188883. The next prime is 56188907. The reversal of 56188890 is 9888165.

56188890 is a `hidden beast` number, since 561 + 8 + 8 + 89 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45562 + ... + 46778.

It is an arithmetic number, because the mean of its divisors is an integer number (1662570).

Almost surely, 2^56188890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56188890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79803360).

56188890 is an abundant number, since it is smaller than the sum of its proper divisors (103417830).

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

56188890 is a wasteful number, since it uses less digits than its factorization.

56188890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 56188890 is about 7495.9248929001. The cubic root of 56188890 is about 383.0159128247.

The spelling of 56188890 in words is "fifty-six million, one hundred eighty-eight thousand, eight hundred ninety".