56605878 has 72 divisors (see below), whose sum is σ = 148016232. Its totient is φ = 16166304.

The previous prime is 56605877. The next prime is 56605951. The reversal of 56605878 is 87850665.

56605878 is a `hidden beast` number, since 5 + 6 + 60 + 587 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56605873) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22626 + ... + 25002.

It is an arithmetic number, because the mean of its divisors is an integer number (2055781).

Almost surely, 2^56605878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56605878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74008116).

56605878 is an abundant number, since it is smaller than the sum of its proper divisors (91410354).

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

56605878 is a wasteful number, since it uses less digits than its factorization.

56605878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 56605878 is about 7523.6877925656. The cubic root of 56605878 is about 383.9610556208.

The spelling of 56605878 in words is "fifty-six million, six hundred five thousand, eight hundred seventy-eight".