678789702 has 96 divisors (see below), whose sum is σ = 1621002240. Its totient is φ = 204353280.

The previous prime is 678789691. The next prime is 678789707. The reversal of 678789702 is 207987876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678789707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1545999 + ... + 1546437.

It is an arithmetic number, because the mean of its divisors is an integer number (16885440).

Almost surely, 2^678789702 is an apocalyptic number.

678789702 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 678789702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810501120).

678789702 is an abundant number, since it is smaller than the sum of its proper divisors (942212538).

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

678789702 is a wasteful number, since it uses less digits than its factorization.

678789702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 678789702 is about 26053.5928808293. The cubic root of 678789702 is about 878.8439114487.

The spelling of 678789702 in words is "six hundred seventy-eight million, seven hundred eighty-nine thousand, seven hundred two".