77268887 has 4 divisors (see below), whose sum is σ = 79153536. Its totient is φ = 75384240.

The previous prime is 77268871. The next prime is 77268911. The reversal of 77268887 is 78886277.

It is a happy number.

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

It is not a de Polignac number, because 77268887 - 2⁴ = 77268871 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 (77268817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942263 + ... + 942344.

It is an arithmetic number, because the mean of its divisors is an integer number (19788384).

Almost surely, 2^77268887 is an apocalyptic number.

77268887 is a deficient number, since it is larger than the sum of its proper divisors (1884649).

77268887 is a wasteful number, since it uses less digits than its factorization.

77268887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884648.

The product of its digits is 2107392, while the sum is 53.

The square root of 77268887 is about 8790.2722938485. The cubic root of 77268887 is about 425.9267196719.

The spelling of 77268887 in words is "seventy-seven million, two hundred sixty-eight thousand, eight hundred eighty-seven".