22678920 has 256 divisors, whose sum is σ = 87091200. Its totient is φ = 5195520.

The previous prime is 22678919. The next prime is 22678927. The reversal of 22678920 is 2987622.

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

It is not an unprimeable number, because it can be changed into a prime (22678927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 273199 + ... + 273281.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^22678920 is an apocalyptic number.

22678920 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 22678920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43545600).

22678920 is an abundant number, since it is smaller than the sum of its proper divisors (64412280).

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

22678920 is a wasteful number, since it uses less digits than its factorization.

22678920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 127 counting only the distinct ones).

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

The square root of 22678920 is about 4762.2389692245. The cubic root of 22678920 is about 283.0571457058.

The spelling of 22678920 in words is "twenty-two million, six hundred seventy-eight thousand, nine hundred twenty".