23389920 has 144 divisors (see below), whose sum is σ = 82162080. Its totient is φ = 6054912.

The previous prime is 23389913. The next prime is 23389963. The reversal of 23389920 is 2998332.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

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, 53061 + ... + 53499.

It is an arithmetic number, because the mean of its divisors is an integer number (570570).

Almost surely, 2^23389920 is an apocalyptic number.

23389920 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 23389920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41081040).

23389920 is an abundant number, since it is smaller than the sum of its proper divisors (58772160).

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

23389920 is a wasteful number, since it uses less digits than its factorization.

23389920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 23389920 is about 4836.3126449807. The cubic root of 23389920 is about 285.9847743211.

The spelling of 23389920 in words is "twenty-three million, three hundred eighty-nine thousand, nine hundred twenty".