22939240 has 16 divisors (see below), whose sum is σ = 51613380. Its totient is φ = 9175680.

The previous prime is 22939219. The next prime is 22939247. The reversal of 22939240 is 4293922.

It can be written as a sum of positive squares in 2 ways, for example, as 22600516 + 338724 = 4754^2 + 582^2 .

It is not an unprimeable number, because it can be changed into a prime (22939247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286701 + ... + 286780.

Almost surely, 2^22939240 is an apocalyptic number.

22939240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22939240 is an abundant number, since it is smaller than the sum of its proper divisors (28674140).

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

22939240 is a wasteful number, since it uses less digits than its factorization.

22939240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573492 (or 573488 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 22939240 is about 4789.4926662435. The cubic root of 22939240 is about 284.1360519856.

The spelling of 22939240 in words is "twenty-two million, nine hundred thirty-nine thousand, two hundred forty".