77694838 has 16 divisors (see below), whose sum is σ = 132113520. Its totient is φ = 33971616.

The previous prime is 77694833. The next prime is 77694839. The reversal of 77694838 is 83849677.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77694833) 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 7 ways as a sum of consecutive naturals, for example, 78145 + ... + 79132.

It is an arithmetic number, because the mean of its divisors is an integer number (8257095).

Almost surely, 2^77694838 is an apocalyptic number.

77694838 is a deficient number, since it is larger than the sum of its proper divisors (54418682).

77694838 is a wasteful number, since it uses less digits than its factorization.

77694838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157311.

The product of its digits is 2032128, while the sum is 52.

The square root of 77694838 is about 8814.4675392221. The cubic root of 77694838 is about 426.7079377667.

The spelling of 77694838 in words is "seventy-seven million, six hundred ninety-four thousand, eight hundred thirty-eight".