678406774 has 8 divisors (see below), whose sum is σ = 1019151648. Its totient is φ = 338689560.

The previous prime is 678406769. The next prime is 678406783. The reversal of 678406774 is 477604876.

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

It is a congruent number.

It is an unprimeable number.

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, 255262 + ... + 257905.

It is an arithmetic number, because the mean of its divisors is an integer number (127393956).

Almost surely, 2^678406774 is an apocalyptic number.

678406774 is a deficient number, since it is larger than the sum of its proper divisors (340744874).

678406774 is a wasteful number, since it uses less digits than its factorization.

678406774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513830.

The product of its (nonzero) digits is 1580544, while the sum is 49.

The square root of 678406774 is about 26046.2429920325. The cubic root of 678406774 is about 878.6786186030.

The spelling of 678406774 in words is "six hundred seventy-eight million, four hundred six thousand, seven hundred seventy-four".