15728734 has 16 divisors (see below), whose sum is σ = 28136448. Its totient is φ = 6447672.

The previous prime is 15728729. The next prime is 15728747. The reversal of 15728734 is 43782751.

It is a junction number, because it is equal to n+sod(n) for n = 15728693 and 15728702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24102 + ... + 24745.

It is an arithmetic number, because the mean of its divisors is an integer number (1758528).

Almost surely, 2^15728734 is an apocalyptic number.

15728734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15728734 is a deficient number, since it is larger than the sum of its proper divisors (12407714).

15728734 is a wasteful number, since it uses less digits than its factorization.

15728734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48879.

The product of its digits is 47040, while the sum is 37.

The square root of 15728734 is about 3965.9467974243. The cubic root of 15728734 is about 250.5520281624.

The spelling of 15728734 in words is "fifteen million, seven hundred twenty-eight thousand, seven hundred thirty-four".