1390984 has 32 divisors (see below), whose sum is σ = 3038400. Its totient is φ = 584640.

The previous prime is 1390979. The next prime is 1390993. The reversal of 1390984 is 4890931.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3094 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (94950).

2^1390984 is an apocalyptic number.

1390984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519200).

1390984 is an abundant number, since it is smaller than the sum of its proper divisors (1647416).

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

1390984 is a wasteful number, since it uses less digits than its factorization.

1390984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 489 counting only the distinct ones).

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

The square root of 1390984 is about 1179.3998473800. The cubic root of 1390984 is about 111.6282316178.

The spelling of 1390984 in words is "one million, three hundred ninety thousand, nine hundred eighty-four".