77536728 has 48 divisors (see below), whose sum is σ = 222351480. Its totient is φ = 24324864.

The previous prime is 77536717. The next prime is 77536741. The reversal of 77536728 is 82763577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30450 + ... + 32897.

Almost surely, 2^77536728 is an apocalyptic number.

It is an amenable number.

77536728 is an abundant number, since it is smaller than the sum of its proper divisors (144814752).

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

77536728 is a wasteful number, since it uses less digits than its factorization.

77536728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63376 (or 63369 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 77536728 is about 8805.4941939678. The cubic root of 77536728 is about 426.4182891411.

The spelling of 77536728 in words is "seventy-seven million, five hundred thirty-six thousand, seven hundred twenty-eight".