22979040 has 144 divisors (see below), whose sum is σ = 84287952. Its totient is φ = 5246976.

The previous prime is 22979039. The next prime is 22979041. The reversal of 22979040 is 4097922.

It is an interprime number because it is at equal distance from previous prime (22979039) and next prime (22979041).

It is a junction number, because it is equal to n+sod(n) for n = 22978992 and 22979010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22979041) 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, 23032 + ... + 24008.

It is an arithmetic number, because the mean of its divisors is an integer number (585333).

Almost surely, 2^22979040 is an apocalyptic number.

22979040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22979040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42143976).

22979040 is an abundant number, since it is smaller than the sum of its proper divisors (61308912).

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

22979040 is a wasteful number, since it uses less digits than its factorization.

22979040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 22979040 is about 4793.6457941738. The cubic root of 22979040 is about 284.3002841186.

The spelling of 22979040 in words is "twenty-two million, nine hundred seventy-nine thousand, forty".