23992720 has 20 divisors (see below), whose sum is σ = 55783260. Its totient is φ = 9597056.

The previous prime is 23992699. The next prime is 23992739. The reversal of 23992720 is 2729932.

It can be written as a sum of positive squares in 2 ways, for example, as 9339136 + 14653584 = 3056^2 + 3828^2 .

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

It is a super-2 number, since 2×23992720² = 1151301225996800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149875 + ... + 150034.

It is an arithmetic number, because the mean of its divisors is an integer number (2789163).

Almost surely, 2^23992720 is an apocalyptic number.

23992720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23992720 is an abundant number, since it is smaller than the sum of its proper divisors (31790540).

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

23992720 is a wasteful number, since it uses less digits than its factorization.

23992720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299922 (or 299916 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 23992720 is about 4898.2364173241. The cubic root of 23992720 is about 288.4207456207.

The spelling of 23992720 in words is "twenty-three million, nine hundred ninety-two thousand, seven hundred twenty".