1391628 has 24 divisors (see below), whose sum is σ = 3711232. Its totient is φ = 397584.

The previous prime is 1391627. The next prime is 1391629. The reversal of 1391628 is 8261931.

It is an interprime number because it is at equal distance from previous prime (1391627) and next prime (1391629).

It is a junction number, because it is equal to n+sod(n) for n = 1391595 and 1391604.

It is not an unprimeable number, because it can be changed into a prime (1391627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8200 + ... + 8367.

2^1391628 is an apocalyptic number.

It is an amenable number.

1391628 is an abundant number, since it is smaller than the sum of its proper divisors (2319604).

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

1391628 is a wasteful number, since it uses less digits than its factorization.

1391628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16581 (or 16579 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 1391628 is about 1179.6728360016. The cubic root of 1391628 is about 111.6454562323.

The spelling of 1391628 in words is "one million, three hundred ninety-one thousand, six hundred twenty-eight".