22640943 has 32 divisors (see below), whose sum is σ = 34220032. Its totient is φ = 13219200.

The previous prime is 22640941. The next prime is 22640963. The reversal of 22640943 is 34904622.

22640943 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 22640943 - 2¹ = 22640941 is a prime.

It is a super-2 number, since 2×22640943² = 1025224599858498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22640943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640941) 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, 73596 + ... + 73902.

It is an arithmetic number, because the mean of its divisors is an integer number (1069376).

Almost surely, 2^22640943 is an apocalyptic number.

22640943 is a deficient number, since it is larger than the sum of its proper divisors (11579089).

22640943 is a wasteful number, since it uses less digits than its factorization.

22640943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 22640943 is about 4758.2499934325. The cubic root of 22640943 is about 282.8990595904.

The spelling of 22640943 in words is "twenty-two million, six hundred forty thousand, nine hundred forty-three".