1398831 has 16 divisors (see below), whose sum is σ = 2169600. Its totient is φ = 785088.

The previous prime is 1398781. The next prime is 1398841. The reversal of 1398831 is 1388931.

It is not a de Polignac number, because 1398831 - 2¹³ = 1390639 is a prime.

It is a super-2 number, since 2×1398831² = 3913456333122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1398792 and 1398801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675 + ... + 1803.

It is an arithmetic number, because the mean of its divisors is an integer number (135600).

2^1398831 is an apocalyptic number.

1398831 is a deficient number, since it is larger than the sum of its proper divisors (770769).

1398831 is a wasteful number, since it uses less digits than its factorization.

1398831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its digits is 5184, while the sum is 33.

The square root of 1398831 is about 1182.7218607940. The cubic root of 1398831 is about 111.8377486955.

The spelling of 1398831 in words is "one million, three hundred ninety-eight thousand, eight hundred thirty-one".