728193478 has 32 divisors (see below), whose sum is σ = 1167425280. Its totient is φ = 339910560.

The previous prime is 728193467. The next prime is 728193493. The reversal of 728193478 is 874391827.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 389101 + ... + 390967.

It is an arithmetic number, because the mean of its divisors is an integer number (36482040).

Almost surely, 2^728193478 is an apocalyptic number.

728193478 is a deficient number, since it is larger than the sum of its proper divisors (439231802).

728193478 is a wasteful number, since it uses less digits than its factorization.

728193478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092.

The product of its digits is 677376, while the sum is 49.

The square root of 728193478 is about 26985.0602741591. The cubic root of 728193478 is about 899.6679754682.

The spelling of 728193478 in words is "seven hundred twenty-eight million, one hundred ninety-three thousand, four hundred seventy-eight".