678978104 has 64 divisors (see below), whose sum is σ = 1491000000. Its totient is φ = 289747584.

The previous prime is 678978059. The next prime is 678978107. The reversal of 678978104 is 401879876.

It is a super-2 number, since 2×678978104² = 922022531422869632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678978107) 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, 957302 + ... + 958010.

It is an arithmetic number, because the mean of its divisors is an integer number (23296875).

Almost surely, 2^678978104 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 678978104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745500000).

678978104 is an abundant number, since it is smaller than the sum of its proper divisors (812021896).

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

678978104 is a wasteful number, since it uses less digits than its factorization.

678978104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 678978104 is about 26057.2082925244. The cubic root of 678978104 is about 878.9252133274.

The spelling of 678978104 in words is "six hundred seventy-eight million, nine hundred seventy-eight thousand, one hundred four".