56542090 has 48 divisors (see below), whose sum is σ = 113418144. Its totient is φ = 20276960.

The previous prime is 56542067. The next prime is 56542091. The reversal of 56542090 is 9024565.

It is not an unprimeable number, because it can be changed into a prime (56542091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100149 + ... + 100711.

It is an arithmetic number, because the mean of its divisors is an integer number (2362878).

Almost surely, 2^56542090 is an apocalyptic number.

56542090 is an abundant number, since it is smaller than the sum of its proper divisors (56876054).

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

56542090 is a wasteful number, since it uses less digits than its factorization.

56542090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 56542090 is about 7519.4474531045. The cubic root of 56542090 is about 383.8167754722.

It can be divided in two parts, 5654 and 2090, that added together give a square (7744 = 88²).

The spelling of 56542090 in words is "fifty-six million, five hundred forty-two thousand, ninety".