22428378 has 72 divisors (see below), whose sum is σ = 57620160. Its totient is φ = 6284880.

The previous prime is 22428359. The next prime is 22428383. The reversal of 22428378 is 87382422.

Its product of digits (43008) is a multiple of the sum of its prime factors (512).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51823 + ... + 52253.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^22428378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22428378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28810080).

22428378 is an abundant number, since it is smaller than the sum of its proper divisors (35191782).

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

22428378 is a wasteful number, since it uses less digits than its factorization.

22428378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 502 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 22428378 is about 4735.8608509964. The cubic root of 22428378 is about 282.0109396692.

The spelling of 22428378 in words is "twenty-two million, four hundred twenty-eight thousand, three hundred seventy-eight".