77687532 has 48 divisors (see below), whose sum is σ = 216909280. Its totient is φ = 23903424.

The previous prime is 77687509. The next prime is 77687543. The reversal of 77687532 is 23578677.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26263 + ... + 29070.

Almost surely, 2^77687532 is an apocalyptic number.

It is an amenable number.

77687532 is an abundant number, since it is smaller than the sum of its proper divisors (139221748).

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

77687532 is a wasteful number, since it uses less digits than its factorization.

77687532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55359 (or 55351 counting only the distinct ones).

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

The square root of 77687532 is about 8814.0530971852. The cubic root of 77687532 is about 426.6945622495.

The spelling of 77687532 in words is "seventy-seven million, six hundred eighty-seven thousand, five hundred thirty-two".