22788420 has 48 divisors (see below), whose sum is σ = 65173248. Its totient is φ = 5946880.

The previous prime is 22788413. The next prime is 22788421. The reversal of 22788420 is 2488722.

It is not an unprimeable number, because it can be changed into a prime (22788421) by changing a digit.

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, 1221 + ... + 6860.

It is an arithmetic number, because the mean of its divisors is an integer number (1357776).

Almost surely, 2^22788420 is an apocalyptic number.

22788420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22788420 is an abundant number, since it is smaller than the sum of its proper divisors (42384828).

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

22788420 is a wasteful number, since it uses less digits than its factorization.

22788420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140 (or 8138 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 22788420 is about 4773.7218184557. The cubic root of 22788420 is about 283.5119734654.

The spelling of 22788420 in words is "twenty-two million, seven hundred eighty-eight thousand, four hundred twenty".