23397520 has 20 divisors (see below), whose sum is σ = 54399420. Its totient is φ = 9358976.

The previous prime is 23397503. The next prime is 23397523. The reversal of 23397520 is 2579332.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 6718464 = 4084^2 + 2592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (23397523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146155 + ... + 146314.

It is an arithmetic number, because the mean of its divisors is an integer number (2719971).

Almost surely, 2^23397520 is an apocalyptic number.

23397520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23397520 is an abundant number, since it is smaller than the sum of its proper divisors (31001900).

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

23397520 is a wasteful number, since it uses less digits than its factorization.

23397520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292482 (or 292476 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 23397520 is about 4837.0983037354. The cubic root of 23397520 is about 286.0157456244.

The spelling of 23397520 in words is "twenty-three million, three hundred ninety-seven thousand, five hundred twenty".