22978620 has 96 divisors (see below), whose sum is σ = 81715200. Its totient is φ = 5251392.

The previous prime is 22978609. The next prime is 22978649. The reversal of 22978620 is 2687922.

22978620 is a `hidden beast` number, since 2 + 29 + 7 + 8 + 620 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 741 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (851200).

Almost surely, 2^22978620 is an apocalyptic number.

22978620 is a gapful number since it is divisible by the number (20) 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 22978620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40857600).

22978620 is an abundant number, since it is smaller than the sum of its proper divisors (58736580).

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

22978620 is a wasteful number, since it uses less digits than its factorization.

22978620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104 (or 6096 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 22978620 is about 4793.6019859809. The cubic root of 22978620 is about 284.2985520061.

The spelling of 22978620 in words is "twenty-two million, nine hundred seventy-eight thousand, six hundred twenty".