23378409 has 8 divisors (see below), whose sum is σ = 34634720. Its totient is φ = 15585588.

The previous prime is 23378393. The next prime is 23378423. The reversal of 23378409 is 90487332.

It is not a de Polignac number, because 23378409 - 2⁴ = 23378393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23378479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432907 + ... + 432960.

It is an arithmetic number, because the mean of its divisors is an integer number (4329340).

Almost surely, 2^23378409 is an apocalyptic number.

It is an amenable number.

23378409 is a deficient number, since it is larger than the sum of its proper divisors (11256311).

23378409 is an equidigital number, since it uses as much as digits as its factorization.

23378409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865876 (or 865870 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 23378409 is about 4835.1224389875. The cubic root of 23378409 is about 285.9378522436.

The spelling of 23378409 in words is "twenty-three million, three hundred seventy-eight thousand, four hundred nine".