678992546 has 16 divisors (see below), whose sum is σ = 1086898176. Its totient is φ = 317007936.

The previous prime is 678992543. The next prime is 678992551. The reversal of 678992546 is 645299876.

It is a happy number.

It is a super-2 number, since 2×678992546² = 922061755047124232, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 678992491 and 678992500.

It is not an unprimeable number, because it can be changed into a prime (678992543) 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 7 ways as a sum of consecutive naturals, for example, 74306 + ... + 82941.

It is an arithmetic number, because the mean of its divisors is an integer number (67931136).

Almost surely, 2^678992546 is an apocalyptic number.

678992546 is a deficient number, since it is larger than the sum of its proper divisors (407905630).

678992546 is a wasteful number, since it uses less digits than its factorization.

678992546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157393.

The product of its digits is 6531840, while the sum is 56.

The square root of 678992546 is about 26057.4854120654. The cubic root of 678992546 is about 878.9314449216.

The spelling of 678992546 in words is "six hundred seventy-eight million, nine hundred ninety-two thousand, five hundred forty-six".