22157280 has 192 divisors, whose sum is σ = 81285120. Its totient is φ = 5626368.

The previous prime is 22157269. The next prime is 22157293. The reversal of 22157280 is 8275122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 99249 + ... + 99471.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^22157280 is an apocalyptic number.

22157280 is a gapful number since it is divisible by the number (20) 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 22157280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

22157280 is an abundant number, since it is smaller than the sum of its proper divisors (59127840).

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

22157280 is a wasteful number, since it uses less digits than its factorization.

22157280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22157280 is about 4707.1520051938. The cubic root of 22157280 is about 280.8700825876.

The spelling of 22157280 in words is "twenty-two million, one hundred fifty-seven thousand, two hundred eighty".