678899832 has 128 divisors (see below), whose sum is σ = 1930521600. Its totient is φ = 197379072.

The previous prime is 678899827. The next prime is 678899839. The reversal of 678899832 is 238998876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678899839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 638133 + ... + 639195.

It is an arithmetic number, because the mean of its divisors is an integer number (15082200).

Almost surely, 2^678899832 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 678899832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965260800).

678899832 is an abundant number, since it is smaller than the sum of its proper divisors (1251621768).

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

678899832 is a wasteful number, since it uses less digits than its factorization.

678899832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1193 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 678899832 is about 26055.7063231838. The cubic root of 678899832 is about 878.8914381204.

The spelling of 678899832 in words is "six hundred seventy-eight million, eight hundred ninety-nine thousand, eight hundred thirty-two".