23408520 has 32 divisors (see below), whose sum is σ = 70225920. Its totient is φ = 6242240.

The previous prime is 23408519. The next prime is 23408537. The reversal of 23408520 is 2580432.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97416 + ... + 97655.

It is an arithmetic number, because the mean of its divisors is an integer number (2194560).

Almost surely, 2^23408520 is an apocalyptic number.

23408520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23408520 is an abundant number, since it is smaller than the sum of its proper divisors (46817400).

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

23408520 is a wasteful number, since it uses less digits than its factorization.

23408520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195085 (or 195081 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 23408520 is about 4838.2352154479. The cubic root of 23408520 is about 286.0605606345.

Adding to 23408520 its reverse (2580432), we get a palindrome (25988952).

The spelling of 23408520 in words is "twenty-three million, four hundred eight thousand, five hundred twenty".