720431678 has 16 divisors (see below), whose sum is σ = 1144782720. Its totient is φ = 338858496.

The previous prime is 720431653. The next prime is 720431689. The reversal of 720431678 is 876134027.

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 7 ways as a sum of consecutive naturals, for example, 88550 + ... + 96342.

It is an arithmetic number, because the mean of its divisors is an integer number (71548920).

Almost surely, 2^720431678 is an apocalyptic number.

720431678 is a deficient number, since it is larger than the sum of its proper divisors (424351042).

720431678 is a wasteful number, since it uses less digits than its factorization.

720431678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 720431678 is about 26840.8583692847. The cubic root of 720431678 is about 896.4600361031.

The spelling of 720431678 in words is "seven hundred twenty million, four hundred thirty-one thousand, six hundred seventy-eight".