678163140 has 36 divisors (see below), whose sum is σ = 2057095404. Its totient is φ = 180843456.

The previous prime is 678163139. The next prime is 678163153. The reversal of 678163140 is 41361876.

678163140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 69455556 + 608707584 = 8334^2 + 24672^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 678163095 and 678163104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1883607 + ... + 1883966.

It is an arithmetic number, because the mean of its divisors is an integer number (57141539).

Almost surely, 2^678163140 is an apocalyptic number.

678163140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678163140 is an abundant number, since it is smaller than the sum of its proper divisors (1378932264).

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

678163140 is a wasteful number, since it uses less digits than its factorization.

678163140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767588 (or 3767583 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 678163140 is about 26041.5656211373. The cubic root of 678163140 is about 878.5734203518.

The spelling of 678163140 in words is "six hundred seventy-eight million, one hundred sixty-three thousand, one hundred forty".