23457320 has 16 divisors (see below), whose sum is σ = 52779060. Its totient is φ = 9382912.

The previous prime is 23457311. The next prime is 23457341. The reversal of 23457320 is 2375432.

It can be written as a sum of positive squares in 2 ways, for example, as 23406244 + 51076 = 4838^2 + 226^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23457320.

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, 293177 + ... + 293256.

Almost surely, 2^23457320 is an apocalyptic number.

23457320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23457320 is an abundant number, since it is smaller than the sum of its proper divisors (29321740).

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

23457320 is a wasteful number, since it uses less digits than its factorization.

23457320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586444 (or 586440 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 23457320 is about 4843.2757509768. The cubic root of 23457320 is about 286.2592071942.

The spelling of 23457320 in words is "twenty-three million, four hundred fifty-seven thousand, three hundred twenty".