22142990 has 16 divisors (see below), whose sum is σ = 41143680. Its totient is φ = 8571360.

The previous prime is 22142987. The next prime is 22143001. The reversal of 22142990 is 9924122.

It is a super-2 number, since 2×22142990² = 980624012280200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35405 + ... + 36024.

It is an arithmetic number, because the mean of its divisors is an integer number (2571480).

Almost surely, 2^22142990 is an apocalyptic number.

22142990 is a deficient number, since it is larger than the sum of its proper divisors (19000690).

22142990 is a wasteful number, since it uses less digits than its factorization.

22142990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71467.

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

The square root of 22142990 is about 4705.6338574096. The cubic root of 22142990 is about 280.8096886428.

It can be divided in two parts, 22142 and 990, that added together give a palindrome (23132).

The spelling of 22142990 in words is "twenty-two million, one hundred forty-two thousand, nine hundred ninety".