77838676 has 12 divisors (see below), whose sum is σ = 139899508. Its totient is φ = 37867392.

The previous prime is 77838667. The next prime is 77838679. The reversal of 77838676 is 67683877.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59691076 + 18147600 = 7726^2 + 4260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77838679) 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, 262821 + ... + 263116.

Almost surely, 2^77838676 is an apocalyptic number.

It is an amenable number.

77838676 is a deficient number, since it is larger than the sum of its proper divisors (62060832).

77838676 is a wasteful number, since it uses less digits than its factorization.

77838676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525978 (or 525976 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 77838676 is about 8822.6229659892. The cubic root of 77838676 is about 426.9710997338.

The spelling of 77838676 in words is "seventy-seven million, eight hundred thirty-eight thousand, six hundred seventy-six".