22815740 has 12 divisors (see below), whose sum is σ = 47913096. Its totient is φ = 9126288.

The previous prime is 22815731. The next prime is 22815781. The reversal of 22815740 is 4751822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570374 + ... + 570413.

It is an arithmetic number, because the mean of its divisors is an integer number (3992758).

Almost surely, 2^22815740 is an apocalyptic number.

22815740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22815740 is an abundant number, since it is smaller than the sum of its proper divisors (25097356).

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

22815740 is a wasteful number, since it uses less digits than its factorization.

22815740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140796 (or 1140794 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 22815740 is about 4776.5824602952. The cubic root of 22815740 is about 283.6252247558.

The spelling of 22815740 in words is "twenty-two million, eight hundred fifteen thousand, seven hundred forty".