23279520 has 96 divisors (see below), whose sum is σ = 80015040. Its totient is φ = 5642240.

The previous prime is 23279507. The next prime is 23279521. The reversal of 23279520 is 2597232.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (23279521) 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, 3076 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (833490).

Almost surely, 2^23279520 is an apocalyptic number.

23279520 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 23279520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40007520).

23279520 is an abundant number, since it is smaller than the sum of its proper divisors (56735520).

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

23279520 is a wasteful number, since it uses less digits than its factorization.

23279520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438 (or 4430 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 23279520 is about 4824.8854908692. The cubic root of 23279520 is about 285.5341168872.

The spelling of 23279520 in words is "twenty-three million, two hundred seventy-nine thousand, five hundred twenty".