1381984 has 24 divisors (see below), whose sum is σ = 2865240. Its totient is φ = 654336.

The previous prime is 1381979. The next prime is 1381993. The reversal of 1381984 is 4891831.

It is a happy number.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (119385).

2^1381984 is an apocalyptic number.

It is an amenable number.

1381984 is an abundant number, since it is smaller than the sum of its proper divisors (1483256).

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

1381984 is a wasteful number, since it uses less digits than its factorization.

1381984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2294 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 1381984 is about 1175.5781556324. The cubic root of 1381984 is about 111.3869566903.

The spelling of 1381984 in words is "one million, three hundred eighty-one thousand, nine hundred eighty-four".