1396728 has 48 divisors (see below), whose sum is σ = 3985800. Its totient is φ = 440640.

The previous prime is 1396723. The next prime is 1396751. The reversal of 1396728 is 8276931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1396692 and 1396701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 858 + ... + 1878.

2^1396728 is an apocalyptic number.

1396728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1396728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992900).

1396728 is an abundant number, since it is smaller than the sum of its proper divisors (2589072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1396728 is a wasteful number, since it uses less digits than its factorization.

1396728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1045 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1396728 is about 1181.8324754380. The cubic root of 1396728 is about 111.7816750292.

The spelling of 1396728 in words is "one million, three hundred ninety-six thousand, seven hundred twenty-eight".