987036840 has 144 divisors (see below), whose sum is σ = 3331965780. Its totient is φ = 263139840.

The previous prime is 987036839. The next prime is 987036887. The reversal of 987036840 is 48630789.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 977562756 + 9474084 = 31266^2 + 3078^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 260560 + ... + 264320.

Almost surely, 2^987036840 is an apocalyptic number.

987036840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987036840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665982890).

987036840 is an abundant number, since it is smaller than the sum of its proper divisors (2344928940).

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

987036840 is an equidigital number, since it uses as much as digits as its factorization.

987036840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796 (or 3771 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 987036840 is about 31417.1424543990. The cubic root of 987036840 is about 995.6601395239.

The spelling of 987036840 in words is "nine hundred eighty-seven million, thirty-six thousand, eight hundred forty".