77136528 has 80 divisors (see below), whose sum is σ = 230092416. Its totient is φ = 21811200.

The previous prime is 77136517. The next prime is 77136529. The reversal of 77136528 is 82563177.

77136528 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (77136529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32800 + ... + 35072.

Almost surely, 2^77136528 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 77136528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115046208).

77136528 is an abundant number, since it is smaller than the sum of its proper divisors (152955888).

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

77136528 is a wasteful number, since it uses less digits than its factorization.

77136528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2386 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 77136528 is about 8782.7403468394. The cubic root of 77136528 is about 425.6833813021.

It can be divided in two parts, 7713 and 6528, that added together give a palindrome (14241).

The spelling of 77136528 in words is "seventy-seven million, one hundred thirty-six thousand, five hundred twenty-eight".