22991402 has 8 divisors (see below), whose sum is σ = 39413856. Its totient is φ = 9853452.

The previous prime is 22991401. The next prime is 22991407. The reversal of 22991402 is 20419922.

22991402 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22991401) 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 3 ways as a sum of consecutive naturals, for example, 821108 + ... + 821135.

It is an arithmetic number, because the mean of its divisors is an integer number (4926732).

Almost surely, 2^22991402 is an apocalyptic number.

22991402 is a deficient number, since it is larger than the sum of its proper divisors (16422454).

22991402 is a wasteful number, since it uses less digits than its factorization.

22991402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642252.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 22991402 is about 4794.9350360563. The cubic root of 22991402 is about 284.3512565130.

The spelling of 22991402 in words is "twenty-two million, nine hundred ninety-one thousand, four hundred two".