678167492 has 12 divisors (see below), whose sum is σ = 1188593196. Its totient is φ = 338569440.

The previous prime is 678167471. The next prime is 678167507. The reversal of 678167492 is 294761876.

It can be written as a sum of positive squares in 2 ways, for example, as 590295616 + 87871876 = 24296^2 + 9374^2 .

It is a super-2 number, since 2×678167492² = 919822294411140128, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 678167492.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 125603 + ... + 130890.

It is an arithmetic number, because the mean of its divisors is an integer number (99049433).

Almost surely, 2^678167492 is an apocalyptic number.

It is an amenable number.

678167492 is a deficient number, since it is larger than the sum of its proper divisors (510425704).

678167492 is a wasteful number, since it uses less digits than its factorization.

678167492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257158 (or 257156 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 678167492 is about 26041.6491797275. The cubic root of 678167492 is about 878.5752997145.

The spelling of 678167492 in words is "six hundred seventy-eight million, one hundred sixty-seven thousand, four hundred ninety-two".