22156040 has 16 divisors (see below), whose sum is σ = 49851180. Its totient is φ = 8862400.

The previous prime is 22156027. The next prime is 22156111. The reversal of 22156040 is 4065122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22146436 + 9604 = 4706^2 + 98^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 276911 + ... + 276990.

Almost surely, 2^22156040 is an apocalyptic number.

22156040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22156040 is an abundant number, since it is smaller than the sum of its proper divisors (27695140).

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

22156040 is a wasteful number, since it uses less digits than its factorization.

22156040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553912 (or 553908 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22156040 is about 4707.0202888877. The cubic root of 22156040 is about 280.8648429944.

The spelling of 22156040 in words is "twenty-two million, one hundred fifty-six thousand, forty".