15728723 has 8 divisors (see below), whose sum is σ = 16688592. Its totient is φ = 14772736.

The previous prime is 15728717. The next prime is 15728729. The reversal of 15728723 is 32782751.

It is an interprime number because it is at equal distance from previous prime (15728717) and next prime (15728729).

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

It is a cyclic number.

It is not a de Polignac number, because 15728723 - 2¹⁴ = 15712339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15728729) 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, 15611 + ... + 16587.

It is an arithmetic number, because the mean of its divisors is an integer number (2086074).

Almost surely, 2^15728723 is an apocalyptic number.

15728723 is a deficient number, since it is larger than the sum of its proper divisors (959869).

15728723 is an equidigital number, since it uses as much as digits as its factorization.

15728723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its digits is 23520, while the sum is 35.

The square root of 15728723 is about 3965.9454106178. The cubic root of 15728723 is about 250.5519697540.

The spelling of 15728723 in words is "fifteen million, seven hundred twenty-eight thousand, seven hundred twenty-three".