1939984 has 40 divisors (see below), whose sum is σ = 4028760. Its totient is φ = 903168.

The previous prime is 1939969. The next prime is 1939999. The reversal of 1939984 is 4899391.

It is an interprime number because it is at equal distance from previous prime (1939969) and next prime (1939999).

It can be written as a sum of positive squares in 4 ways, for example, as 176400 + 1763584 = 420^2 + 1328^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1939984.

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, 17112 + ... + 17224.

It is an arithmetic number, because the mean of its divisors is an integer number (100719).

2^1939984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1939984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014380).

1939984 is an abundant number, since it is smaller than the sum of its proper divisors (2088776).

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

1939984 is a wasteful number, since it uses less digits than its factorization.

1939984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 1939984 is about 1392.8330840413. The cubic root of 1939984 is about 124.7190275758.

The spelling of 1939984 in words is "one million, nine hundred thirty-nine thousand, nine hundred eighty-four".