23128784 has 30 divisors (see below), whose sum is σ = 52130034. Its totient is φ = 9912000.

The previous prime is 23128733. The next prime is 23128793. The reversal of 23128784 is 48782132.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 4293184 = 4340^2 + 2072^2 .

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, 13967 + ... + 15534.

Almost surely, 2^23128784 is an apocalyptic number.

It is an amenable number.

23128784 is an abundant number, since it is smaller than the sum of its proper divisors (29001250).

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

23128784 is a wasteful number, since it uses less digits than its factorization.

23128784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29523 (or 29510 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 23128784 is about 4809.2394409095. The cubic root of 23128784 is about 284.9164995968.

The spelling of 23128784 in words is "twenty-three million, one hundred twenty-eight thousand, seven hundred eighty-four".