1398904 has 16 divisors (see below), whose sum is σ = 2824920. Its totient is φ = 645600.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398904 is 4098931.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6622 + ... + 6829.

2^1398904 is an apocalyptic number.

It is an amenable number.

1398904 is an abundant number, since it is smaller than the sum of its proper divisors (1426016).

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

1398904 is a wasteful number, since it uses less digits than its factorization.

1398904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470 (or 13466 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1398904 is about 1182.7527214088. The cubic root of 1398904 is about 111.8396941327.

The spelling of 1398904 in words is "one million, three hundred ninety-eight thousand, nine hundred four".