987099120 has 300 divisors, whose sum is σ = 3874051896. Its totient is φ = 225227520.

The previous prime is 987099109. The next prime is 987099121. The reversal of 987099120 is 21990789.

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 (987099121) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1728435 + ... + 1729005.

Almost surely, 2^987099120 is an apocalyptic number.

987099120 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 987099120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937025948).

987099120 is an abundant number, since it is smaller than the sum of its proper divisors (2886952776).

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

987099120 is a wasteful number, since it uses less digits than its factorization.

987099120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 987099120 is about 31418.1336173873. The cubic root of 987099120 is about 995.6810804543.

The spelling of 987099120 in words is "nine hundred eighty-seven million, ninety-nine thousand, one hundred twenty".