23208320 has 32 divisors (see below), whose sum is σ = 55483920. Its totient is φ = 9283072.

The previous prime is 23208301. The next prime is 23208391. The reversal of 23208320 is 2380232.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×23208320² = 1077252234444800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23208292 and 23208301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17492 + ... + 18771.

Almost surely, 2^23208320 is an apocalyptic number.

23208320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23208320 is an abundant number, since it is smaller than the sum of its proper divisors (32275600).

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

23208320 is an equidigital number, since it uses as much as digits as its factorization.

23208320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36282 (or 36270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 23208320 is about 4817.5014270885. The cubic root of 23208320 is about 285.2427192588.

Adding to 23208320 its reverse (2380232), we get a palindrome (25588552).

The spelling of 23208320 in words is "twenty-three million, two hundred eight thousand, three hundred twenty".