775998984 has 64 divisors (see below), whose sum is σ = 1991246400. Its totient is φ = 251870976.

The previous prime is 775998967. The next prime is 775998997. The reversal of 775998984 is 489899577.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400482 + ... + 402414.

It is an arithmetic number, because the mean of its divisors is an integer number (31113225).

Almost surely, 2^775998984 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 775998984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995623200).

775998984 is an abundant number, since it is smaller than the sum of its proper divisors (1215247416).

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

775998984 is a wasteful number, since it uses less digits than its factorization.

775998984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374 (or 2370 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 66.

The square root of 775998984 is about 27856.7583182250. The cubic root of 775998984 is about 918.9397773917.

The spelling of 775998984 in words is "seven hundred seventy-five million, nine hundred ninety-eight thousand, nine hundred eighty-four".