1399868 has 6 divisors (see below), whose sum is σ = 2449776. Its totient is φ = 699932.

The previous prime is 1399861. The next prime is 1399883. The reversal of 1399868 is 8689931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399861) 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 as a sum of consecutive naturals, namely, 174980 + ... + 174987.

It is an arithmetic number, because the mean of its divisors is an integer number (408296).

2^1399868 is an apocalyptic number.

It is an amenable number.

1399868 is a deficient number, since it is larger than the sum of its proper divisors (1049908).

1399868 is a wasteful number, since it uses less digits than its factorization.

1399868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349971 (or 349969 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 1399868 is about 1183.1601751242. The cubic root of 1399868 is about 111.8653782181.

The spelling of 1399868 in words is "one million, three hundred ninety-nine thousand, eight hundred sixty-eight".