22388128 has 48 divisors (see below), whose sum is σ = 50984640. Its totient is φ = 9478656.

The previous prime is 22388111. The next prime is 22388147. The reversal of 22388128 is 82188322.

It is a junction number, because it is equal to n+sod(n) for n = 22388093 and 22388102.

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, 19375 + ... + 20497.

It is an arithmetic number, because the mean of its divisors is an integer number (1062180).

Almost surely, 2^22388128 is an apocalyptic number.

22388128 is a gapful number since it is divisible by the number (28) 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 22388128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25492320).

22388128 is an abundant number, since it is smaller than the sum of its proper divisors (28596512).

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

22388128 is a wasteful number, since it uses less digits than its factorization.

22388128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1221 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 22388128 is about 4731.6094513389. The cubic root of 22388128 is about 281.8421395708.

The spelling of 22388128 in words is "twenty-two million, three hundred eighty-eight thousand, one hundred twenty-eight".