1398885 has 16 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 740480.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398885 is 5888931.

It is not a de Polignac number, because 1398885 - 2¹⁰ = 1397861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2425 + ... + 2945.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^1398885 is an apocalyptic number.

1398885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1398885 is a deficient number, since it is larger than the sum of its proper divisors (856155).

1398885 is a wasteful number, since it uses less digits than its factorization.

1398885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its digits is 69120, while the sum is 42.

The square root of 1398885 is about 1182.7446892715. The cubic root of 1398885 is about 111.8391877925.

The spelling of 1398885 in words is "one million, three hundred ninety-eight thousand, eight hundred eighty-five".