22907690 has 16 divisors (see below), whose sum is σ = 44405928. Its totient is φ = 8458176.

The previous prime is 22907671. The next prime is 22907693. The reversal of 22907690 is 9670922.

It can be written as a sum of positive squares in 4 ways, for example, as 9284209 + 13623481 = 3047^2 + 3691^2 .

It is a super-2 number, since 2×22907690² = 1049524522272200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22907690.

It is not an unprimeable number, because it can be changed into a prime (22907693) 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, 87977 + ... + 88236.

Almost surely, 2^22907690 is an apocalyptic number.

22907690 is a deficient number, since it is larger than the sum of its proper divisors (21498238).

22907690 is a wasteful number, since it uses less digits than its factorization.

22907690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176233.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 22907690 is about 4786.1978646939. The cubic root of 22907690 is about 284.0057279146.

The spelling of 22907690 in words is "twenty-two million, nine hundred seven thousand, six hundred ninety".