22991930 has 64 divisors (see below), whose sum is σ = 47029248. Its totient is φ = 8037120.

The previous prime is 22991909. The next prime is 22991933. The reversal of 22991930 is 3919922.

It is not an unprimeable number, because it can be changed into a prime (22991933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323795 + ... + 323865.

It is an arithmetic number, because the mean of its divisors is an integer number (734832).

Almost surely, 2^22991930 is an apocalyptic number.

22991930 is an abundant number, since it is smaller than the sum of its proper divisors (24037318).

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

22991930 is a wasteful number, since it uses less digits than its factorization.

22991930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 22991930 is about 4794.9900938375. The cubic root of 22991930 is about 284.3534332153.

The spelling of 22991930 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred thirty".