22640132 has 6 divisors (see below), whose sum is σ = 39620238. Its totient is φ = 11320064.

The previous prime is 22640131. The next prime is 22640179. The reversal of 22640132 is 23104622.

It can be written as a sum of positive squares in only one way, i.e., 16370116 + 6270016 = 4046^2 + 2504^2 .

It is not an unprimeable number, because it can be changed into a prime (22640131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830013 + ... + 2830020.

It is an arithmetic number, because the mean of its divisors is an integer number (6603373).

Almost surely, 2^22640132 is an apocalyptic number.

It is an amenable number.

22640132 is a deficient number, since it is larger than the sum of its proper divisors (16980106).

22640132 is a wasteful number, since it uses less digits than its factorization.

22640132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660037 (or 5660035 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22640132 is about 4758.1647722625. The cubic root of 22640132 is about 282.8956817293.

Adding to 22640132 its reverse (23104622), we get a palindrome (45744754).

The spelling of 22640132 in words is "twenty-two million, six hundred forty thousand, one hundred thirty-two".