987512388 has 96 divisors (see below), whose sum is σ = 2567593728. Its totient is φ = 293990400.

The previous prime is 987512381. The next prime is 987512419. The reversal of 987512388 is 883215789.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 987512388.

It is not an unprimeable number, because it can be changed into a prime (987512381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307873 + ... + 311063.

It is an arithmetic number, because the mean of its divisors is an integer number (26745768).

Almost surely, 2^987512388 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 987512388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283796864).

987512388 is an abundant number, since it is smaller than the sum of its proper divisors (1580081340).

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

987512388 is a wasteful number, since it uses less digits than its factorization.

987512388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293 (or 3291 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 987512388 is about 31424.7098315959. The cubic root of 987512388 is about 995.8200147345.

The spelling of 987512388 in words is "nine hundred eighty-seven million, five hundred twelve thousand, three hundred eighty-eight".