987507906 has 64 divisors (see below), whose sum is σ = 2486854656. Its totient is φ = 253944000.

The previous prime is 987507887. The next prime is 987508043. The reversal of 987507906 is 609705789.

987507906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 36081 + ... + 57243.

It is an arithmetic number, because the mean of its divisors is an integer number (38857104).

Almost surely, 2^987507906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987507906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1243427328).

987507906 is an abundant number, since it is smaller than the sum of its proper divisors (1499346750).

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

987507906 is a wasteful number, since it uses less digits than its factorization.

987507906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21287.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 987507906 is about 31424.6385182073. The cubic root of 987507906 is about 995.8185081636.

The spelling of 987507906 in words is "nine hundred eighty-seven million, five hundred seven thousand, nine hundred six".