22158840 has 64 divisors (see below), whose sum is σ = 72524160. Its totient is φ = 5371520.

The previous prime is 22158839. The next prime is 22158881. The reversal of 22158840 is 4885122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22158798 and 22158807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7074 + ... + 9713.

It is an arithmetic number, because the mean of its divisors is an integer number (1133190).

Almost surely, 2^22158840 is an apocalyptic number.

22158840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22158840 is an abundant number, since it is smaller than the sum of its proper divisors (50365320).

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

22158840 is a wasteful number, since it uses less digits than its factorization.

22158840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812 (or 16808 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 22158840 is about 4707.3177075698. The cubic root of 22158840 is about 280.8766740562.

The spelling of 22158840 in words is "twenty-two million, one hundred fifty-eight thousand, eight hundred forty".