23128516 has 12 divisors (see below), whose sum is σ = 41138860. Its totient is φ = 11374560.

The previous prime is 23128507. The next prime is 23128537. The reversal of 23128516 is 61582132.

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 12630916 = 3240^2 + 3554^2 .

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 3 ways as a sum of consecutive naturals, for example, 47151 + ... + 47638.

Almost surely, 2^23128516 is an apocalyptic number.

It is an amenable number.

23128516 is a deficient number, since it is larger than the sum of its proper divisors (18010344).

23128516 is a wasteful number, since it uses less digits than its factorization.

23128516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94854 (or 94852 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 23128516 is about 4809.2115777953. The cubic root of 23128516 is about 284.9153991222.

It can be divided in two parts, 231285 and 16, that multiplied together give a triangular number (3700560 = T₂₇₂₀).

The spelling of 23128516 in words is "twenty-three million, one hundred twenty-eight thousand, five hundred sixteen".