22690557 has 16 divisors (see below), whose sum is σ = 34776000. Its totient is φ = 14604912.

The previous prime is 22690537. The next prime is 22690567. The reversal of 22690557 is 75509622.

It is not a de Polignac number, because 22690557 - 2⁷ = 22690429 is a prime.

It is a super-2 number, since 2×22690557² = 1029722753940498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22690537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13707 + ... + 15272.

It is an arithmetic number, because the mean of its divisors is an integer number (2173500).

Almost surely, 2^22690557 is an apocalyptic number.

22690557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22690557 is a deficient number, since it is larger than the sum of its proper divisors (12085443).

22690557 is a wasteful number, since it uses less digits than its factorization.

22690557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29017 (or 29011 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 22690557 is about 4763.4606117822. The cubic root of 22690557 is about 283.1055514907.

The spelling of 22690557 in words is "twenty-two million, six hundred ninety thousand, five hundred fifty-seven".