1391328 has 36 divisors (see below), whose sum is σ = 3957408. Its totient is φ = 463680.

The previous prime is 1391323. The next prime is 1391353. The reversal of 1391328 is 8231931.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2128 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (109928).

2^1391328 is an apocalyptic number.

1391328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1391328 is an abundant number, since it is smaller than the sum of its proper divisors (2566080).

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

1391328 is a wasteful number, since it uses less digits than its factorization.

1391328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4847 (or 4836 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1391328 is about 1179.5456752496. The cubic root of 1391328 is about 111.6374330049.

The spelling of 1391328 in words is "one million, three hundred ninety-one thousand, three hundred twenty-eight".