981734864 has 80 divisors (see below), whose sum is σ = 2198162880. Its totient is φ = 420065280.

The previous prime is 981734863. The next prime is 981734903. The reversal of 981734864 is 468437189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981734861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577664 + ... + 579360.

It is an arithmetic number, because the mean of its divisors is an integer number (27477036).

Almost surely, 2^981734864 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 981734864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099081440).

981734864 is an abundant number, since it is smaller than the sum of its proper divisors (1216428016).

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

981734864 is a wasteful number, since it uses less digits than its factorization.

981734864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1902 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 981734864 is about 31332.6485315238. The cubic root of 981734864 is about 993.8741721925.

The spelling of 981734864 in words is "nine hundred eighty-one million, seven hundred thirty-four thousand, eight hundred sixty-four".