22392540 has 72 divisors (see below), whose sum is σ = 70132608. Its totient is φ = 5777280.

The previous prime is 22392527. The next prime is 22392541. The reversal of 22392540 is 4529322.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22392541) 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, 3574 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (974064).

Almost surely, 2^22392540 is an apocalyptic number.

22392540 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 22392540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35066304).

22392540 is an abundant number, since it is smaller than the sum of its proper divisors (47740068).

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

22392540 is a wasteful number, since it uses less digits than its factorization.

22392540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 22392540 is about 4732.0756545093. The cubic root of 22392540 is about 281.8606524458.

The spelling of 22392540 in words is "twenty-two million, three hundred ninety-two thousand, five hundred forty".