22978944 has 128 divisors (see below), whose sum is σ = 69564000. Its totient is φ = 7464960.

The previous prime is 22978939. The next prime is 22978957. The reversal of 22978944 is 44987922.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 22978944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210762 + ... + 210870.

Almost surely, 2^22978944 is an apocalyptic number.

22978944 is a gapful number since it is divisible by the number (24) 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 22978944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34782000).

22978944 is an abundant number, since it is smaller than the sum of its proper divisors (46585056).

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

22978944 is a wasteful number, since it uses less digits than its factorization.

22978944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 175 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 22978944 is about 4793.6357809078. The cubic root of 22978944 is about 284.2998882090.

The spelling of 22978944 in words is "twenty-two million, nine hundred seventy-eight thousand, nine hundred forty-four".