15728923 has 8 divisors (see below), whose sum is σ = 18017280. Its totient is φ = 13450920.

The previous prime is 15728917. The next prime is 15728929. The reversal of 15728923 is 32982751.

It is an interprime number because it is at equal distance from previous prime (15728917) and next prime (15728929).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15728923 - 2²¹ = 13631771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15728929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008 + ... + 5698.

It is an arithmetic number, because the mean of its divisors is an integer number (2252160).

Almost surely, 2^15728923 is an apocalyptic number.

15728923 is a deficient number, since it is larger than the sum of its proper divisors (2288357).

15728923 is an equidigital number, since it uses as much as digits as its factorization.

15728923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its digits is 30240, while the sum is 37.

The square root of 15728923 is about 3965.9706252064. The cubic root of 15728923 is about 250.5530317216.

The spelling of 15728923 in words is "fifteen million, seven hundred twenty-eight thousand, nine hundred twenty-three".