74728766 has 32 divisors (see below), whose sum is σ = 133885440. Its totient is φ = 30604896.

The previous prime is 74728733. The next prime is 74728777. The reversal of 74728766 is 66782747.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74728766.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40925 + ... + 42711.

It is an arithmetic number, because the mean of its divisors is an integer number (4183920).

Almost surely, 2^74728766 is an apocalyptic number.

74728766 is a deficient number, since it is larger than the sum of its proper divisors (59156674).

74728766 is a wasteful number, since it uses less digits than its factorization.

74728766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its digits is 790272, while the sum is 47.

The square root of 74728766 is about 8644.5801517483. The cubic root of 74728766 is about 421.2073461025.

The spelling of 74728766 in words is "seventy-four million, seven hundred twenty-eight thousand, seven hundred sixty-six".