22539740 has 24 divisors (see below), whose sum is σ = 48436080. Its totient is φ = 8805888.

The previous prime is 22539707. The next prime is 22539761. The reversal of 22539740 is 4793522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22539697 and 22539706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12245 + ... + 13964.

It is an arithmetic number, because the mean of its divisors is an integer number (2018170).

Almost surely, 2^22539740 is an apocalyptic number.

22539740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22539740 is an abundant number, since it is smaller than the sum of its proper divisors (25896340).

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

22539740 is a wasteful number, since it uses less digits than its factorization.

22539740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26261 (or 26259 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22539740 is about 4747.6036060312. The cubic root of 22539740 is about 282.4769187815.

The spelling of 22539740 in words is "twenty-two million, five hundred thirty-nine thousand, seven hundred forty".