23320240 has 20 divisors (see below), whose sum is σ = 54219744. Its totient is φ = 9328064.

The previous prime is 23320237. The next prime is 23320259. The reversal of 23320240 is 4202332.

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145672 + ... + 145831.

Almost surely, 2^23320240 is an apocalyptic number.

23320240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23320240 is an abundant number, since it is smaller than the sum of its proper divisors (30899504).

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

23320240 is a wasteful number, since it uses less digits than its factorization.

23320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291516 (or 291510 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 23320240 is about 4829.1034364569. The cubic root of 23320240 is about 285.7005031447.

Adding to 23320240 its reverse (4202332), we get a palindrome (27522572).

The spelling of 23320240 in words is "twenty-three million, three hundred twenty thousand, two hundred forty".