22156992 has 168 divisors, whose sum is σ = 74889360. Its totient is φ = 6174720.

The previous prime is 22156987. The next prime is 22156993. The reversal of 22156992 is 29965122.

It is a happy number.

22156992 is a `hidden beast` number, since 2 + 2 + 1 + 569 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82234 + ... + 82502.

It is an arithmetic number, because the mean of its divisors is an integer number (445770).

Almost surely, 2^22156992 is an apocalyptic number.

22156992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37444680).

22156992 is an abundant number, since it is smaller than the sum of its proper divisors (52732368).

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

22156992 is a wasteful number, since it uses less digits than its factorization.

22156992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 298 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 22156992 is about 4707.1214133481. The cubic root of 22156992 is about 280.8688656672.

The spelling of 22156992 in words is "twenty-two million, one hundred fifty-six thousand, nine hundred ninety-two".