77838634 has 8 divisors (see below), whose sum is σ = 117011520. Its totient is φ = 38834796.

The previous prime is 77838619. The next prime is 77838653. The reversal of 77838634 is 43683877.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 41104 + ... + 42955.

It is an arithmetic number, because the mean of its divisors is an integer number (14626440).

Almost surely, 2^77838634 is an apocalyptic number.

77838634 is a deficient number, since it is larger than the sum of its proper divisors (39172886).

77838634 is a wasteful number, since it uses less digits than its factorization.

77838634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84524.

The product of its digits is 677376, while the sum is 46.

The square root of 77838634 is about 8822.6205857444. The cubic root of 77838634 is about 426.9710229391.

The spelling of 77838634 in words is "seventy-seven million, eight hundred thirty-eight thousand, six hundred thirty-four".