987089520 has 120 divisors (see below), whose sum is σ = 3229788816. Its totient is φ = 249348096.

The previous prime is 987089497. The next prime is 987089573. The reversal of 987089520 is 25980789.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 987089520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80944 + ... + 92336.

Almost surely, 2^987089520 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 987089520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614894408).

987089520 is an abundant number, since it is smaller than the sum of its proper divisors (2242699296).

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

987089520 is a wasteful number, since it uses less digits than its factorization.

987089520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11447 (or 11422 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 987089520 is about 31417.9808390036. The cubic root of 987089520 is about 995.6778526227.

The spelling of 987089520 in words is "nine hundred eighty-seven million, eighty-nine thousand, five hundred twenty".