987990500 has 192 divisors, whose sum is σ = 2641766400. Its totient is φ = 315273600.

The previous prime is 987990427. The next prime is 987990503. The reversal of 987990500 is 5099789.

It is a super-2 number, since 2×987990500² = 1952250456180500000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (987990503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5519411 + ... + 5519589.

It is an arithmetic number, because the mean of its divisors is an integer number (13759200).

Almost surely, 2^987990500 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 987990500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320883200).

987990500 is an abundant number, since it is smaller than the sum of its proper divisors (1653775900).

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

987990500 is a wasteful number, since it uses less digits than its factorization.

987990500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 987990500 is about 31432.3161730089. The cubic root of 987990500 is about 995.9807002061.

The spelling of 987990500 in words is "nine hundred eighty-seven million, nine hundred ninety thousand, five hundred".