1984887156 has 96 divisors (see below), whose sum is σ = 5613898752. Its totient is φ = 532846080.

The previous prime is 1984887133. The next prime is 1984887169. The reversal of 1984887156 is 6517884891.

It is a junction number, because it is equal to n+sod(n) for n = 1984887096 and 1984887105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1671595 + ... + 1672781.

It is an arithmetic number, because the mean of its divisors is an integer number (58478112).

Almost surely, 2^1984887156 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 1984887156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2806949376).

1984887156 is an abundant number, since it is smaller than the sum of its proper divisors (3629011596).

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

1984887156 is a wasteful number, since it uses less digits than its factorization.

1984887156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2387 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 57.

The square root of 1984887156 is about 44552.0724097095. The cubic root of 1984887156 is about 1256.7395243575.

The spelling of 1984887156 in words is "one billion, nine hundred eighty-four million, eight hundred eighty-seven thousand, one hundred fifty-six".