23439900 has 72 divisors (see below), whose sum is σ = 73995264. Its totient is φ = 5681600.

The previous prime is 23439893. The next prime is 23439919. The reversal of 23439900 is 993432.

It is a Smith number, since the sum of its digits (30) 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 (30).

It is a congruent number.

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, 252 + ... + 6851.

It is an arithmetic number, because the mean of its divisors is an integer number (1027712).

Almost surely, 2^23439900 is an apocalyptic number.

23439900 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 23439900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36997632).

23439900 is an abundant number, since it is smaller than the sum of its proper divisors (50555364).

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

23439900 is a wasteful number, since it uses less digits than its factorization.

23439900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131 (or 7124 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 23439900 is about 4841.4770473483. The cubic root of 23439900 is about 286.1883285331.

The spelling of 23439900 in words is "twenty-three million, four hundred thirty-nine thousand, nine hundred".