678368592 has 90 divisors (see below), whose sum is σ = 2086823466. Its totient is φ = 205560960.

The previous prime is 678368573. The next prime is 678368599. The reversal of 678368592 is 295863876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 351337536 + 327031056 = 18744^2 + 18084^2 .

It is a super-2 number, since 2×678368592² = 920367893224124928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678368599) 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 17 ways as a sum of consecutive naturals, for example, 2043 + ... + 36890.

Almost surely, 2^678368592 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 678368592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043411733).

678368592 is an abundant number, since it is smaller than the sum of its proper divisors (1408454874).

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

678368592 is a wasteful number, since it uses less digits than its factorization.

678368592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38969 (or 38949 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 678368592 is about 26045.5100161237. The cubic root of 678368592 is about 878.6621337359.

The spelling of 678368592 in words is "six hundred seventy-eight million, three hundred sixty-eight thousand, five hundred ninety-two".