987640570 has 48 divisors (see below), whose sum is σ = 2070927648. Its totient is φ = 338140320.

The previous prime is 987640567. The next prime is 987640583. The reversal of 987640570 is 75046789.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 987640570.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627885 + ... + 629455.

It is an arithmetic number, because the mean of its divisors is an integer number (43144326).

Almost surely, 2^987640570 is an apocalyptic number.

987640570 is the 25660-th pentagonal number.

987640570 is an abundant number, since it is smaller than the sum of its proper divisors (1083287078).

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

987640570 is a wasteful number, since it uses less digits than its factorization.

987640570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 987640570 is about 31426.7492751000. The cubic root of 987640570 is about 995.8630996551.

The spelling of 987640570 in words is "nine hundred eighty-seven million, six hundred forty thousand, five hundred seventy".