22991982 has 32 divisors (see below), whose sum is σ = 49744800. Its totient is φ = 7042560.

The previous prime is 22991981. The next prime is 22991999. The reversal of 22991982 is 28919922.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991981) 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, 21394 + ... + 22442.

It is an arithmetic number, because the mean of its divisors is an integer number (1554525).

Almost surely, 2^22991982 is an apocalyptic number.

22991982 is an abundant number, since it is smaller than the sum of its proper divisors (26752818).

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

22991982 is a wasteful number, since it uses less digits than its factorization.

22991982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348.

The product of its digits is 46656, while the sum is 42.

The square root of 22991982 is about 4794.9955161606. The cubic root of 22991982 is about 284.3536475857.

The spelling of 22991982 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred eighty-two".