22499220 has 24 divisors (see below), whose sum is σ = 62997984. Its totient is φ = 5999776.

The previous prime is 22499207. The next prime is 22499263. The reversal of 22499220 is 2299422.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187434 + ... + 187553.

It is an arithmetic number, because the mean of its divisors is an integer number (2624916).

Almost surely, 2^22499220 is an apocalyptic number.

22499220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22499220 is an abundant number, since it is smaller than the sum of its proper divisors (40498764).

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

22499220 is a wasteful number, since it uses less digits than its factorization.

22499220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374999 (or 374997 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 22499220 is about 4743.3342703208. The cubic root of 22499220 is about 282.3075463684.

The spelling of 22499220 in words is "twenty-two million, four hundred ninety-nine thousand, two hundred twenty".