22164140 has 12 divisors (see below), whose sum is σ = 46544736. Its totient is φ = 8865648.

The previous prime is 22164139. The next prime is 22164151. The reversal of 22164140 is 4146122.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1108207 = 22164140 / (2 + 2 + 1 + 6 + 4 + 1 + 4 + 0).

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 554084 + ... + 554123.

It is an arithmetic number, because the mean of its divisors is an integer number (3878728).

Almost surely, 2^22164140 is an apocalyptic number.

22164140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22164140 is an abundant number, since it is smaller than the sum of its proper divisors (24380596).

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

22164140 is a wasteful number, since it uses less digits than its factorization.

22164140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108216 (or 1108214 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22164140 is about 4707.8806272037. The cubic root of 22164140 is about 280.8990658375.

The spelling of 22164140 in words is "twenty-two million, one hundred sixty-four thousand, one hundred forty".