678714912 has 144 divisors (see below), whose sum is σ = 2041079040. Its totient is φ = 213497856.

The previous prime is 678714877. The next prime is 678714913. The reversal of 678714912 is 219417876.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (678714913) 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, 522648 + ... + 523944.

It is an arithmetic number, because the mean of its divisors is an integer number (14174160).

Almost surely, 2^678714912 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 678714912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020539520).

678714912 is an abundant number, since it is smaller than the sum of its proper divisors (1362364128).

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

678714912 is a wasteful number, since it uses less digits than its factorization.

678714912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1404 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 678714912 is about 26052.1575306154. The cubic root of 678714912 is about 878.8116328455.

The spelling of 678714912 in words is "six hundred seventy-eight million, seven hundred fourteen thousand, nine hundred twelve".