1398684 has 24 divisors (see below), whose sum is σ = 3730048. Its totient is φ = 399600.

The previous prime is 1398667. The next prime is 1398701. The reversal of 1398684 is 4868931.

It is an interprime number because it is at equal distance from previous prime (1398667) and next prime (1398701).

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8242 + ... + 8409.

2^1398684 is an apocalyptic number.

1398684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1398684 is an abundant number, since it is smaller than the sum of its proper divisors (2331364).

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

1398684 is a wasteful number, since it uses less digits than its factorization.

1398684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665 (or 16663 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1398684 is about 1182.6597143727. The cubic root of 1398684 is about 111.8338309658.

The spelling of 1398684 in words is "one million, three hundred ninety-eight thousand, six hundred eighty-four".