678725264 has 30 divisors (see below), whose sum is σ = 1529730774. Its totient is φ = 290881920.

The previous prime is 678725249. The next prime is 678725269. The reversal of 678725264 is 462527876.

It can be written as a sum of positive squares in only one way, i.e., 663577600 + 15147664 = 25760^2 + 3892^2 .

It is not an unprimeable number, because it can be changed into a prime (678725269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432077 + ... + 433644.

Almost surely, 2^678725264 is an apocalyptic number.

It is an amenable number.

678725264 is an abundant number, since it is smaller than the sum of its proper divisors (851005510).

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

678725264 is a wasteful number, since it uses less digits than its factorization.

678725264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865743 (or 865730 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 678725264 is about 26052.3562082204. The cubic root of 678725264 is about 878.8161008048.

The spelling of 678725264 in words is "six hundred seventy-eight million, seven hundred twenty-five thousand, two hundred sixty-four".