22640264 has 8 divisors (see below), whose sum is σ = 42450510. Its totient is φ = 11320128.

The previous prime is 22640249. The next prime is 22640269. The reversal of 22640264 is 46204622.

It can be written as a sum of positive squares in only one way, i.e., 18992164 + 3648100 = 4358^2 + 1910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (22640269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1415009 + ... + 1415024.

Almost surely, 2^22640264 is an apocalyptic number.

It is an amenable number.

22640264 is a deficient number, since it is larger than the sum of its proper divisors (19810246).

22640264 is a wasteful number, since it uses less digits than its factorization.

22640264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830039 (or 2830035 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 22640264 is about 4758.1786431365. The cubic root of 22640264 is about 282.8962315223.

Adding to 22640264 its reverse (46204622), we get a palindrome (68844886).

The spelling of 22640264 in words is "twenty-two million, six hundred forty thousand, two hundred sixty-four".