77328805 has 4 divisors (see below), whose sum is σ = 92794572. Its totient is φ = 61863040.

The previous prime is 77328791. The next prime is 77328821. The reversal of 77328805 is 50882377.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12397441 + 64931364 = 3521^2 + 8058^2 .

It is not a de Polignac number, because 77328805 - 2⁵ = 77328773 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7732876 + ... + 7732885.

It is an arithmetic number, because the mean of its divisors is an integer number (23198643).

Almost surely, 2^77328805 is an apocalyptic number.

It is an amenable number.

77328805 is a deficient number, since it is larger than the sum of its proper divisors (15465767).

77328805 is a wasteful number, since it uses less digits than its factorization.

77328805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15465766.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 77328805 is about 8793.6798326980. The cubic root of 77328805 is about 426.0367858937.

The spelling of 77328805 in words is "seventy-seven million, three hundred twenty-eight thousand, eight hundred five".