22913540 has 24 divisors (see below), whose sum is σ = 51820440. Its totient is φ = 8460288.

The previous prime is 22913519. The next prime is 22913549. The reversal of 22913540 is 4531922.

22913540 = T₃₈₄ + T₃₈₅ + ... + T₅₇₈.

It can be written as a sum of positive squares in 4 ways, for example, as 7744 + 22905796 = 88^2 + 4786^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (22913549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43805 + ... + 44324.

It is an arithmetic number, because the mean of its divisors is an integer number (2159185).

Almost surely, 2^22913540 is an apocalyptic number.

22913540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22913540 is an abundant number, since it is smaller than the sum of its proper divisors (28906900).

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

22913540 is a wasteful number, since it uses less digits than its factorization.

22913540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88151 (or 88149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22913540 is about 4786.8089579594. The cubic root of 22913540 is about 284.0299016324.

The spelling of 22913540 in words is "twenty-two million, nine hundred thirteen thousand, five hundred forty".