77078528 has 42 divisors (see below), whose sum is σ = 155753181. Its totient is φ = 38141952.

The previous prime is 77078513. The next prime is 77078569. The reversal of 77078528 is 82587077.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 76877824 + 200704 = 8768^2 + 448^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6208.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 794576 + ... + 794672.

Almost surely, 2^77078528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77078528

77078528 is an abundant number, since it is smaller than the sum of its proper divisors (78674653).

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

77078528 is an frugal number, since it uses more digits than its factorization.

77078528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 77078528 is about 8779.4377952122. The cubic root of 77078528 is about 425.5766621835.

The spelling of 77078528 in words is "seventy-seven million, seventy-eight thousand, five hundred twenty-eight".