22640064 has 28 divisors (see below), whose sum is σ = 59902344. Its totient is φ = 7546624.

The previous prime is 22640053. The next prime is 22640083. The reversal of 22640064 is 46004622.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58767 + ... + 59150.

Almost surely, 2^22640064 is an apocalyptic number.

22640064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22640064 is an abundant number, since it is smaller than the sum of its proper divisors (37262280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22640064 is a wasteful number, since it uses less digits than its factorization.

22640064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117932 (or 117922 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22640064 is about 4758.1576266450. The cubic root of 22640064 is about 282.8953985018.

Adding to 22640064 its reverse (46004622), we get a palindrome (68644686).

The spelling of 22640064 in words is "twenty-two million, six hundred forty thousand, sixty-four".