23897520 has 60 divisors (see below), whose sum is σ = 80258256. Its totient is φ = 6372480.

The previous prime is 23897513. The next prime is 23897527. The reversal of 23897520 is 2579832.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23897513) and next prime (23897527).

It is a tau number, because it is divible by the number of its divisors (60).

It is a Smith number, since the sum of its digits (36) 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 (36).

It is not an unprimeable number, because it can be changed into a prime (23897527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15876 + ... + 17315.

Almost surely, 2^23897520 is an apocalyptic number.

23897520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23897520 is an abundant number, since it is smaller than the sum of its proper divisors (56360736).

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

23897520 is a wasteful number, since it uses less digits than its factorization.

23897520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33210 (or 33201 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23897520 is about 4888.5089751375. The cubic root of 23897520 is about 288.0387679293.

The spelling of 23897520 in words is "twenty-three million, eight hundred ninety-seven thousand, five hundred twenty".