23940985 has 4 divisors (see below), whose sum is σ = 28729188. Its totient is φ = 19152784.

The previous prime is 23940977. The next prime is 23940991. The reversal of 23940985 is 58904932.

It is a happy number.

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 11634921 + 12306064 = 3411^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 23940985 - 2³ = 23940977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394094 + ... + 2394103.

It is an arithmetic number, because the mean of its divisors is an integer number (7182297).

Almost surely, 2^23940985 is an apocalyptic number.

It is an amenable number.

23940985 is a deficient number, since it is larger than the sum of its proper divisors (4788203).

23940985 is an equidigital number, since it uses as much as digits as its factorization.

23940985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788202.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 23940985 is about 4892.9525850962. The cubic root of 23940985 is about 288.2132912335.

Subtracting from 23940985 its product of nonzero digits (77760), we obtain a square (23863225 = 4885²).

The spelling of 23940985 in words is "twenty-three million, nine hundred forty thousand, nine hundred eighty-five".