22979880 has 192 divisors, whose sum is σ = 93225600. Its totient is φ = 4769280.

The previous prime is 22979867. The next prime is 22979881. The reversal of 22979880 is 8897922.

22979880 = T₂₅₇ + T₂₅₈ + ... + T₅₃₆.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (22979881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27306 + ... + 28134.

It is an arithmetic number, because the mean of its divisors is an integer number (485550).

Almost surely, 2^22979880 is an apocalyptic number.

22979880 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 22979880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46612800).

22979880 is an abundant number, since it is smaller than the sum of its proper divisors (70245720).

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

22979880 is a wasteful number, since it uses less digits than its factorization.

22979880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 22979880 is about 4793.7334093585. The cubic root of 22979880 is about 284.3037482803.

The spelling of 22979880 in words is "twenty-two million, nine hundred seventy-nine thousand, eight hundred eighty".