678774312 has 24 divisors (see below), whose sum is σ = 1838347290. Its totient is φ = 226258080.

The previous prime is 678774301. The next prime is 678774359. The reversal of 678774312 is 213477876.

It can be written as a sum of positive squares in only one way, i.e., 493106436 + 185667876 = 22206^2 + 13626^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4713639 + ... + 4713782.

Almost surely, 2^678774312 is an apocalyptic number.

It is an amenable number.

678774312 is an abundant number, since it is smaller than the sum of its proper divisors (1159572978).

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

678774312 is a wasteful number, since it uses less digits than its factorization.

678774312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427433 (or 9427426 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 678774312 is about 26053.2975264169. The cubic root of 678774312 is about 878.8372694750.

The spelling of 678774312 in words is "six hundred seventy-eight million, seven hundred seventy-four thousand, three hundred twelve".