23389812 has 18 divisors (see below), whose sum is σ = 59124338. Its totient is φ = 7796592.

The previous prime is 23389811. The next prime is 23389813. The reversal of 23389812 is 21898332.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23389811) and next prime (23389813).

It can be written as a sum of positive squares in only one way, i.e., 23386896 + 2916 = 4836^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 649717 = 23389812 / (2 + 3 + 3 + 8 + 9 + 8 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23389811) 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 5 ways as a sum of consecutive naturals, for example, 324823 + ... + 324894.

Almost surely, 2^23389812 is an apocalyptic number.

It is an amenable number.

23389812 is an abundant number, since it is smaller than the sum of its proper divisors (35734526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23389812 is a wasteful number, since it uses less digits than its factorization.

23389812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649727 (or 649722 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 23389812 is about 4836.3014794365. The cubic root of 23389812 is about 285.9843341542.

The spelling of 23389812 in words is "twenty-three million, three hundred eighty-nine thousand, eight hundred twelve".