22929990 has 32 divisors (see below), whose sum is σ = 55162080. Its totient is φ = 6100224.

The previous prime is 22929989. The next prime is 22929997. The reversal of 22929990 is 9992922.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22929997) 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 15 ways as a sum of consecutive naturals, for example, 19746 + ... + 20874.

It is an arithmetic number, because the mean of its divisors is an integer number (1723815).

Almost surely, 2^22929990 is an apocalyptic number.

22929990 is an abundant number, since it is smaller than the sum of its proper divisors (32232090).

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

22929990 is a wasteful number, since it uses less digits than its factorization.

22929990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 22929990 is about 4788.5269133628. The cubic root of 22929990 is about 284.0978552561.

The spelling of 22929990 in words is "twenty-two million, nine hundred twenty-nine thousand, nine hundred ninety".