23939380 has 24 divisors (see below), whose sum is σ = 50645448. Its totient is φ = 9504768.

The previous prime is 23939371. The next prime is 23939381. The reversal of 23939380 is 8393932.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 21790224 = 1466^2 + 4668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23939381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629 + ... + 7108.

It is an arithmetic number, because the mean of its divisors is an integer number (2110227).

Almost surely, 2^23939380 is an apocalyptic number.

23939380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23939380 is an abundant number, since it is smaller than the sum of its proper divisors (26706068).

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

23939380 is a wasteful number, since it uses less digits than its factorization.

23939380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883 (or 8881 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 23939380 is about 4892.7885709481. The cubic root of 23939380 is about 288.2068504978.

The spelling of 23939380 in words is "twenty-three million, nine hundred thirty-nine thousand, three hundred eighty".