23404209 has 8 divisors (see below), whose sum is σ = 31317792. Its totient is φ = 15546720.

The previous prime is 23404193. The next prime is 23404211. The reversal of 23404209 is 90240432.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23404209 - 2⁴ = 23404193 is a prime.

It is a super-4 number, since 4×23404209⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (23404229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13039 + ... + 14724.

It is an arithmetic number, because the mean of its divisors is an integer number (3914724).

Almost surely, 2^23404209 is an apocalyptic number.

It is an amenable number.

23404209 is a deficient number, since it is larger than the sum of its proper divisors (7913583).

23404209 is a wasteful number, since it uses less digits than its factorization.

23404209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28047.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 23404209 is about 4837.7896812491. The cubic root of 23404209 is about 286.0429988979.

The spelling of 23404209 in words is "twenty-three million, four hundred four thousand, two hundred nine".