23287520 has 24 divisors (see below), whose sum is σ = 55017144. Its totient is φ = 9314944.

The previous prime is 23287519. The next prime is 23287547. The reversal of 23287520 is 2578232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72614 + ... + 72933.

It is an arithmetic number, because the mean of its divisors is an integer number (2292381).

Almost surely, 2^23287520 is an apocalyptic number.

23287520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23287520 is an abundant number, since it is smaller than the sum of its proper divisors (31729624).

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

23287520 is a wasteful number, since it uses less digits than its factorization.

23287520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145562 (or 145554 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 23287520 is about 4825.7144548761. The cubic root of 23287520 is about 285.5668210456.

The spelling of 23287520 in words is "twenty-three million, two hundred eighty-seven thousand, five hundred twenty".