981798688 has 48 divisors (see below), whose sum is σ = 2204065080. Its totient is φ = 426479616.

The previous prime is 981798619. The next prime is 981798691. The reversal of 981798688 is 886897189.

It can be written as a sum of positive squares in 4 ways, for example, as 730512784 + 251285904 = 27028^2 + 15852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62343 + ... + 76486.

Almost surely, 2^981798688 is an apocalyptic number.

It is an amenable number.

981798688 is an abundant number, since it is smaller than the sum of its proper divisors (1222266392).

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

981798688 is a wasteful number, since it uses less digits than its factorization.

981798688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138869 (or 138861 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 64.

The square root of 981798688 is about 31333.6670053155. The cubic root of 981798688 is about 993.8957094571.

The spelling of 981798688 in words is "nine hundred eighty-one million, seven hundred ninety-eight thousand, six hundred eighty-eight".