987005646 has 48 divisors (see below), whose sum is σ = 2351351808. Its totient is φ = 296730000.

The previous prime is 987005623. The next prime is 987005659. The reversal of 987005646 is 646500789.

987005646 is a `hidden beast` number, since 9 + 87 + 0 + 0 + 564 + 6 = 666.

987005646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 5521 + ... + 44771.

It is an arithmetic number, because the mean of its divisors is an integer number (48986496).

Almost surely, 2^987005646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987005646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175675904).

987005646 is an abundant number, since it is smaller than the sum of its proper divisors (1364346162).

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

987005646 is a wasteful number, since it uses less digits than its factorization.

987005646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39397 (or 39394 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 987005646 is about 31416.6460017616. The cubic root of 987005646 is about 995.6496505707.

The spelling of 987005646 in words is "nine hundred eighty-seven million, five thousand, six hundred forty-six".