987551136 has 192 divisors, whose sum is σ = 3384339840. Its totient is φ = 276203520.

The previous prime is 987551129. The next prime is 987551167. The reversal of 987551136 is 631155789.

It is a happy number.

987551136 is a `hidden beast` number, since 9 + 87 + 551 + 13 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 987551091 and 987551100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119556 + ... + 127548.

It is an arithmetic number, because the mean of its divisors is an integer number (17626770).

Almost surely, 2^987551136 is an apocalyptic number.

987551136 is a gapful number since it is divisible by the number (96) 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 987551136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692169920).

987551136 is an abundant number, since it is smaller than the sum of its proper divisors (2396788704).

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

987551136 is a wasteful number, since it uses less digits than its factorization.

987551136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036 (or 8022 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 987551136 is about 31425.3263467541. The cubic root of 987551136 is about 995.8330392223.

The spelling of 987551136 in words is "nine hundred eighty-seven million, five hundred fifty-one thousand, one hundred thirty-six".