987639091200 has 936 divisors, whose sum is σ = 3863458799200. Its totient is φ = 249389383680.

The previous prime is 987639091189. The next prime is 987639091247. The reversal of 987639091200 is 2190936789.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 472779756 + ... + 472781844.

Almost surely, 2^987639091200 is an apocalyptic number.

987639091200 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 987639091200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931729399600).

987639091200 is an abundant number, since it is smaller than the sum of its proper divisors (2875819708000).

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

987639091200 is a wasteful number, since it uses less digits than its factorization.

987639091200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 987639091200 in words is "nine hundred eighty-seven billion, six hundred thirty-nine million, ninety-one thousand, two hundred".