678624946 has 8 divisors (see below), whose sum is σ = 1018810224. Its totient is φ = 339021540.

The previous prime is 678624943. The next prime is 678624967. The reversal of 678624946 is 649426876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 678624893 and 678624902.

It is not an unprimeable number, because it can be changed into a prime (678624943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142540 + ... + 147223.

It is an arithmetic number, because the mean of its divisors is an integer number (127351278).

Almost surely, 2^678624946 is an apocalyptic number.

678624946 is a deficient number, since it is larger than the sum of its proper divisors (340185278).

678624946 is a wasteful number, since it uses less digits than its factorization.

678624946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290936.

The product of its digits is 3483648, while the sum is 52.

The square root of 678624946 is about 26050.4308217734. The cubic root of 678624946 is about 878.7728012931.

The spelling of 678624946 in words is "six hundred seventy-eight million, six hundred twenty-four thousand, nine hundred forty-six".