22957720 has 32 divisors (see below), whose sum is σ = 51807600. Its totient is φ = 9155968.

The previous prime is 22957699. The next prime is 22957721. The reversal of 22957720 is 2775922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22957721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18066 + ... + 19294.

Almost surely, 2^22957720 is an apocalyptic number.

22957720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22957720 is an abundant number, since it is smaller than the sum of its proper divisors (28849880).

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

22957720 is a wasteful number, since it uses less digits than its factorization.

22957720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 22957720 is about 4791.4215009744. The cubic root of 22957720 is about 284.2123321186.

The spelling of 22957720 in words is "twenty-two million, nine hundred fifty-seven thousand, seven hundred twenty".