678139700 has 72 divisors (see below), whose sum is σ = 1727306112. Its totient is φ = 226212480.

The previous prime is 678139699. The next prime is 678139703. The reversal of 678139700 is 7931876.

678139700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678139703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12809 + ... + 38991.

Almost surely, 2^678139700 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 678139700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863653056).

678139700 is an abundant number, since it is smaller than the sum of its proper divisors (1049166412).

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

678139700 is a wasteful number, since it uses less digits than its factorization.

678139700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26241 (or 26234 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 678139700 is about 26041.1155675021. The cubic root of 678139700 is about 878.5632979113.

The spelling of 678139700 in words is "six hundred seventy-eight million, one hundred thirty-nine thousand, seven hundred".