987640000 has 70 divisors (see below), whose sum is σ = 2449125404. Its totient is φ = 395040000.

The previous prime is 987639929. The next prime is 987640013. The reversal of 987640000 is 46789.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27655 + ... + 52345.

Almost surely, 2^987640000 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 987640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224562702).

987640000 is an abundant number, since it is smaller than the sum of its proper divisors (1461485404).

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

987640000 is an equidigital number, since it uses as much as digits as its factorization.

987640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24723 (or 24698 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 987640000 is about 31426.7402063911. The cubic root of 987640000 is about 995.8629080732.

Adding to 987640000 its reverse (46789), we get a palindrome (987686789).

The spelling of 987640000 in words is "nine hundred eighty-seven million, six hundred forty thousand".