987844320 has 72 divisors (see below), whose sum is σ = 3371023656. Its totient is φ = 263424768.

The previous prime is 987844307. The next prime is 987844321. The reversal of 987844320 is 23448789.

987844320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×987844320³ (a number of 28 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987844321) 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, 341562 + ... + 344441.

It is an arithmetic number, because the mean of its divisors is an integer number (46819773).

Almost surely, 2^987844320 is an apocalyptic number.

987844320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

987844320 is an abundant number, since it is smaller than the sum of its proper divisors (2383179336).

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

987844320 is a wasteful number, since it uses less digits than its factorization.

987844320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686024 (or 686013 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 987844320 is about 31429.9907731453. The cubic root of 987844320 is about 995.9315770483.

The spelling of 987844320 in words is "nine hundred eighty-seven million, eight hundred forty-four thousand, three hundred twenty".