22878144 has 42 divisors (see below), whose sum is σ = 65577720. Its totient is φ = 7625856.

The previous prime is 22878133. The next prime is 22878151. The reversal of 22878144 is 44187822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22878099 and 22878108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19284 + ... + 20435.

Almost surely, 2^22878144 is an apocalyptic number.

22878144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22878144 is an abundant number, since it is smaller than the sum of its proper divisors (42699576).

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

22878144 is a wasteful number, since it uses less digits than its factorization.

22878144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39737 (or 39724 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 22878144 is about 4783.1102851596. The cubic root of 22878144 is about 283.8835732517.

The spelling of 22878144 in words is "twenty-two million, eight hundred seventy-eight thousand, one hundred forty-four".