23920285 has 4 divisors (see below), whose sum is σ = 28704348. Its totient is φ = 19136224.

The previous prime is 23920279. The next prime is 23920289. The reversal of 23920285 is 58202932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4656964 + 19263321 = 2158^2 + 4389^2 .

It is a cyclic number.

It is not a de Polignac number, because 23920285 - 2³ = 23920277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23920289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392024 + ... + 2392033.

It is an arithmetic number, because the mean of its divisors is an integer number (7176087).

Almost surely, 2^23920285 is an apocalyptic number.

It is an amenable number.

23920285 is a deficient number, since it is larger than the sum of its proper divisors (4784063).

23920285 is an equidigital number, since it uses as much as digits as its factorization.

23920285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784062.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 23920285 is about 4890.8368404599. The cubic root of 23920285 is about 288.1302017058.

The spelling of 23920285 in words is "twenty-three million, nine hundred twenty thousand, two hundred eighty-five".