678396264 has 128 divisors (see below), whose sum is σ = 2107607040. Its totient is φ = 177184512.

The previous prime is 678396263. The next prime is 678396289. The reversal of 678396264 is 462693876.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (678396263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232237 + ... + 235139.

It is an arithmetic number, because the mean of its divisors is an integer number (16465680).

Almost surely, 2^678396264 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 678396264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053803520).

678396264 is an abundant number, since it is smaller than the sum of its proper divisors (1429210776).

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

678396264 is a wasteful number, since it uses less digits than its factorization.

678396264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3035 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 678396264 is about 26046.0412347059. The cubic root of 678396264 is about 878.6740810303.

The spelling of 678396264 in words is "six hundred seventy-eight million, three hundred ninety-six thousand, two hundred sixty-four".