1399684 has 24 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 587040.

The previous prime is 1399679. The next prime is 1399687. The reversal of 1399684 is 4869931.

It is not an unprimeable number, because it can be changed into a prime (1399687) 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, 652 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (119952).

2^1399684 is an apocalyptic number.

It is an amenable number.

1399684 is an abundant number, since it is smaller than the sum of its proper divisors (1479164).

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

1399684 is a wasteful number, since it uses less digits than its factorization.

1399684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2473 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 1399684 is about 1183.0824147117. The cubic root of 1399684 is about 111.8604767723.

The spelling of 1399684 in words is "one million, three hundred ninety-nine thousand, six hundred eighty-four".