23403312 has 30 divisors (see below), whose sum is σ = 65497172. Its totient is φ = 7801056.

The previous prime is 23403293. The next prime is 23403313. The reversal of 23403312 is 21330432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23403313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81118 + ... + 81405.

Almost surely, 2^23403312 is an apocalyptic number.

It is an amenable number.

23403312 is an abundant number, since it is smaller than the sum of its proper divisors (42093860).

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

23403312 is a wasteful number, since it uses less digits than its factorization.

23403312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162537 (or 162528 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 23403312 is about 4837.6969727340. The cubic root of 23403312 is about 286.0393445147.

Adding to 23403312 its reverse (21330432), we get a palindrome (44733744).

The spelling of 23403312 in words is "twenty-three million, four hundred three thousand, three hundred twelve".