76128887 has 4 divisors (see below), whose sum is σ = 76156080. Its totient is φ = 76101696.

The previous prime is 76128863. The next prime is 76128893. The reversal of 76128887 is 78882167.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 76128887 - 2²⁴ = 59351671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76128847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8843 + ... + 15180.

It is an arithmetic number, because the mean of its divisors is an integer number (19039020).

Almost surely, 2^76128887 is an apocalyptic number.

76128887 is a deficient number, since it is larger than the sum of its proper divisors (27193).

76128887 is a wasteful number, since it uses less digits than its factorization.

76128887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27192.

The product of its digits is 301056, while the sum is 47.

The square root of 76128887 is about 8725.1869320949. The cubic root of 76128887 is about 423.8216717004.

The spelling of 76128887 in words is "seventy-six million, one hundred twenty-eight thousand, eight hundred eighty-seven".