77928336 has 60 divisors (see below), whose sum is σ = 225623580. Its totient is φ = 25079040.

The previous prime is 77928313. The next prime is 77928349. The reversal of 77928336 is 63382977.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21678336 + 56250000 = 4656^2 + 7500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77928291 and 77928300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5155 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (3760393).

Almost surely, 2^77928336 is an apocalyptic number.

It is an amenable number.

77928336 is an abundant number, since it is smaller than the sum of its proper divisors (147695244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77928336 is a wasteful number, since it uses less digits than its factorization.

77928336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18704 (or 18695 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 77928336 is about 8827.7027589288. The cubic root of 77928336 is about 427.1349751638.

The spelling of 77928336 in words is "seventy-seven million, nine hundred twenty-eight thousand, three hundred thirty-six".