987878766 has 32 divisors (see below), whose sum is σ = 2300617728. Its totient is φ = 276924960.

The previous prime is 987878741. The next prime is 987878779. The reversal of 987878766 is 667878789.

It is a junction number, because it is equal to n+sod(n) for n = 987878697 and 987878706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219670 + ... + 224121.

It is an arithmetic number, because the mean of its divisors is an integer number (71894304).

Almost surely, 2^987878766 is an apocalyptic number.

987878766 is an abundant number, since it is smaller than the sum of its proper divisors (1312738962).

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

987878766 is a wasteful number, since it uses less digits than its factorization.

987878766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443856.

The product of its digits is 56899584, while the sum is 66.

The square root of 987878766 is about 31430.5387481666. The cubic root of 987878766 is about 995.9431529143.

The spelling of 987878766 in words is "nine hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred sixty-six".