1393728 has 112 divisors (see below), whose sum is σ = 4535424. Its totient is φ = 368640.

The previous prime is 1393723. The next prime is 1393739. The reversal of 1393728 is 8273931.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22818 + ... + 22878.

2^1393728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1393728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267712).

1393728 is an abundant number, since it is smaller than the sum of its proper divisors (3141696).

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

1393728 is a wasteful number, since it uses less digits than its factorization.

1393728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 90 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 1393728 is about 1180.5625777569. The cubic root of 1393728 is about 111.7015865641.

The spelling of 1393728 in words is "one million, three hundred ninety-three thousand, seven hundred twenty-eight".