1984138 has 24 divisors (see below), whose sum is σ = 3445092. Its totient is φ = 849024.

The previous prime is 1984133. The next prime is 1984139. The reversal of 1984138 is 8314891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1979649 + 4489 = 1407^2 + 67^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29581 + ... + 29647.

2^1984138 is an apocalyptic number.

1984138 is a deficient number, since it is larger than the sum of its proper divisors (1460954).

1984138 is a wasteful number, since it uses less digits than its factorization.

1984138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 99 counting only the distinct ones).

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

The square root of 1984138 is about 1408.5943347891. The cubic root of 1984138 is about 125.6581394053.

The spelling of 1984138 in words is "one million, nine hundred eighty-four thousand, one hundred thirty-eight".