77187268 has 6 divisors (see below), whose sum is σ = 135077726. Its totient is φ = 38593632.

The previous prime is 77187263. The next prime is 77187277. The reversal of 77187268 is 86278177.

It can be written as a sum of positive squares in only one way, i.e., 76003524 + 1183744 = 8718^2 + 1088^2 .

It is not an unprimeable number, because it can be changed into a prime (77187263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9648405 + ... + 9648412.

Almost surely, 2^77187268 is an apocalyptic number.

It is an amenable number.

77187268 is a deficient number, since it is larger than the sum of its proper divisors (57890458).

77187268 is a wasteful number, since it uses less digits than its factorization.

77187268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19296821 (or 19296819 counting only the distinct ones).

The product of its digits is 263424, while the sum is 46.

The square root of 77187268 is about 8785.6284920317. The cubic root of 77187268 is about 425.7766982693.

Subtracting 77187268 from its reverse (86278177), we obtain a palindrome (9090909).

The spelling of 77187268 in words is "seventy-seven million, one hundred eighty-seven thousand, two hundred sixty-eight".