23378509 has 8 divisors (see below), whose sum is σ = 29147328. Its totient is φ = 18216960.

The previous prime is 23378507. The next prime is 23378513. The reversal of 23378509 is 90587332.

23378509 is nontrivially palindromic in base 2.

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

It is a cyclic number.

It is not a de Polignac number, because 23378509 - 2¹ = 23378507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23378501) 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, 151732 + ... + 151885.

It is an arithmetic number, because the mean of its divisors is an integer number (3643416).

Almost surely, 2^23378509 is an apocalyptic number.

It is an amenable number.

23378509 is a deficient number, since it is larger than the sum of its proper divisors (5768819).

23378509 is a wasteful number, since it uses less digits than its factorization.

23378509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303635.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 23378509 is about 4835.1327799762. The cubic root of 23378509 is about 285.9382599381.

The spelling of 23378509 in words is "twenty-three million, three hundred seventy-eight thousand, five hundred nine".