1399980 has 24 divisors (see below), whose sum is σ = 3920112. Its totient is φ = 373312.

The previous prime is 1399963. The next prime is 1399999. The reversal of 1399980 is 899931.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 11607 + ... + 11726.

It is an arithmetic number, because the mean of its divisors is an integer number (163338).

2^1399980 is an apocalyptic number.

1399980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399980 is an abundant number, since it is smaller than the sum of its proper divisors (2520132).

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

1399980 is a wasteful number, since it uses less digits than its factorization.

1399980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23345 (or 23343 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1399980 is about 1183.2075050472. The cubic root of 1399980 is about 111.8683614966.

The spelling of 1399980 in words is "one million, three hundred ninety-nine thousand, nine hundred eighty".