678722244 has 12 divisors (see below), whose sum is σ = 1583685264. Its totient is φ = 226240744.

The previous prime is 678722227. The next prime is 678722251. The reversal of 678722244 is 442227876.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 678722196 and 678722205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28280082 + ... + 28280105.

It is an arithmetic number, because the mean of its divisors is an integer number (131973772).

Almost surely, 2^678722244 is an apocalyptic number.

It is an amenable number.

678722244 is an abundant number, since it is smaller than the sum of its proper divisors (904963020).

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

678722244 is a wasteful number, since it uses less digits than its factorization.

678722244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56560194 (or 56560192 counting only the distinct ones).

The product of its digits is 301056, while the sum is 42.

The square root of 678722244 is about 26052.2982479473. The cubic root of 678722244 is about 878.8147973670.

The spelling of 678722244 in words is "six hundred seventy-eight million, seven hundred twenty-two thousand, two hundred forty-four".