1987829244 has 144 divisors (see below), whose sum is σ = 5682942720. Its totient is φ = 582543360.

The previous prime is 1987829243. The next prime is 1987829251. The reversal of 1987829244 is 4429287891.

It is a super-2 number, since 2×1987829244² = 7902930206603223072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987829243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 548382 + ... + 551994.

It is an arithmetic number, because the mean of its divisors is an integer number (39464880).

Almost surely, 2^1987829244 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 1987829244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2841471360).

1987829244 is an abundant number, since it is smaller than the sum of its proper divisors (3695113476).

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

1987829244 is a wasteful number, since it uses less digits than its factorization.

1987829244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700 (or 3695 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1987829244 is about 44585.0787147449. The cubic root of 1987829244 is about 1257.3601495535.

The spelling of 1987829244 in words is "one billion, nine hundred eighty-seven million, eight hundred twenty-nine thousand, two hundred forty-four".