23531328 has 42 divisors (see below), whose sum is σ = 67449954. Its totient is φ = 7843584.

The previous prime is 23531309. The next prime is 23531341. The reversal of 23531328 is 82313532.

It can be written as a sum of positive squares in only one way, i.e., 23503104 + 28224 = 4848^2 + 168^2 .

It is a congruent number.

It is an unprimeable number.

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, 19851 + ... + 21002.

Almost surely, 2^23531328 is an apocalyptic number.

It is an amenable number.

23531328 is an abundant number, since it is smaller than the sum of its proper divisors (43918626).

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

23531328 is a wasteful number, since it uses less digits than its factorization.

23531328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40871 (or 40858 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 23531328 is about 4850.9100177183. The cubic root of 23531328 is about 286.5599410415.

The spelling of 23531328 in words is "twenty-three million, five hundred thirty-one thousand, three hundred twenty-eight".