23669865 has 24 divisors (see below), whose sum is σ = 43442568. Its totient is φ = 11880960.

The previous prime is 23669813. The next prime is 23669873. The reversal of 23669865 is 56896632.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2903616 + 20766249 = 1704^2 + 4557^2 .

It is not a de Polignac number, because 23669865 - 2⁸ = 23669609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23669865.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14706 + ... + 16235.

It is an arithmetic number, because the mean of its divisors is an integer number (1810107).

Almost surely, 2^23669865 is an apocalyptic number.

It is an amenable number.

23669865 is a deficient number, since it is larger than the sum of its proper divisors (19772703).

23669865 is a wasteful number, since it uses less digits than its factorization.

23669865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30969 (or 30966 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 23669865 is about 4865.1685479539. The cubic root of 23669865 is about 287.1211999281.

The spelling of 23669865 in words is "twenty-three million, six hundred sixty-nine thousand, eight hundred sixty-five".