1390398 has 16 divisors (see below), whose sum is σ = 2810640. Its totient is φ = 458496.

The previous prime is 1390391. The next prime is 1390399. The reversal of 1390398 is 8930931.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390391) 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 7 ways as a sum of consecutive naturals, for example, 613 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (175665).

2^1390398 is an apocalyptic number.

1390398 is an abundant number, since it is smaller than the sum of its proper divisors (1420242).

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

1390398 is a wasteful number, since it uses less digits than its factorization.

1390398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1390398 is about 1179.1513897715. The cubic root of 1390398 is about 111.6125536680.

The spelling of 1390398 in words is "one million, three hundred ninety thousand, three hundred ninety-eight".