23400909 has 24 divisors (see below), whose sum is σ = 39678080. Its totient is φ = 13009248.

The previous prime is 23400907. The next prime is 23400929. The reversal of 23400909 is 90900432.

It is not a de Polignac number, because 23400909 - 2¹ = 23400907 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 (23400907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2689 + ... + 7350.

Almost surely, 2^23400909 is an apocalyptic number.

It is an amenable number.

23400909 is a deficient number, since it is larger than the sum of its proper divisors (16277171).

23400909 is a wasteful number, since it uses less digits than its factorization.

23400909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089 (or 10086 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 23400909 is about 4837.4486043781. The cubic root of 23400909 is about 286.0295542184.

The spelling of 23400909 in words is "twenty-three million, four hundred thousand, nine hundred nine".