1319728 has 10 divisors (see below), whose sum is σ = 2557004. Its totient is φ = 659856.

The previous prime is 1319723. The next prime is 1319729. The reversal of 1319728 is 8279131.

It is a self number, because there is not a number n which added to its sum of digits gives 1319728.

It is not an unprimeable number, because it can be changed into a prime (1319723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41226 + ... + 41257.

2^1319728 is an apocalyptic number.

It is an amenable number.

1319728 is a deficient number, since it is larger than the sum of its proper divisors (1237276).

1319728 is an equidigital number, since it uses as much as digits as its factorization.

1319728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82491 (or 82485 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 1319728 is about 1148.7941504029. The cubic root of 1319728 is about 109.6885958473.

It can be divided in two parts, 13197 and 28, that added together give a square (13225 = 115²).

The spelling of 1319728 in words is "one million, three hundred nineteen thousand, seven hundred twenty-eight".