22399980 has 48 divisors (see below), whose sum is σ = 64748544. Its totient is φ = 5780160.

The previous prime is 22399969. The next prime is 22399987. The reversal of 22399980 is 8999322.

22399980 = 835² + 836² + ... + 865².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22399987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4162 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (1348928).

Almost surely, 2^22399980 is an apocalyptic number.

22399980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22399980 is an abundant number, since it is smaller than the sum of its proper divisors (42348564).

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

22399980 is a wasteful number, since it uses less digits than its factorization.

22399980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12086 (or 12084 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 22399980 is about 4732.8617135936. The cubic root of 22399980 is about 281.8918653862.

The spelling of 22399980 in words is "twenty-two million, three hundred ninety-nine thousand, nine hundred eighty".