23899980 has 72 divisors (see below), whose sum is σ = 72494352. Its totient is φ = 5880576.

The previous prime is 23899963. The next prime is 23899991. The reversal of 23899980 is 8999832.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8962 + ... + 11318.

It is an arithmetic number, because the mean of its divisors is an integer number (1006866).

Almost surely, 2^23899980 is an apocalyptic number.

23899980 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 23899980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36247176).

23899980 is an abundant number, since it is smaller than the sum of its proper divisors (48594372).

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

23899980 is a wasteful number, since it uses less digits than its factorization.

23899980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 23899980 is about 4888.7605791243. The cubic root of 23899980 is about 288.0486511174.

The spelling of 23899980 in words is "twenty-three million, eight hundred ninety-nine thousand, nine hundred eighty".