77692738 has 4 divisors (see below), whose sum is σ = 116539110. Its totient is φ = 38846368.

The previous prime is 77692733. The next prime is 77692751. The reversal of 77692738 is 83729677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83729677 = 163 ⋅513679.

It can be written as a sum of positive squares in only one way, i.e., 48066489 + 29626249 = 6933^2 + 5443^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 77692691 and 77692700.

It is not an unprimeable number, because it can be changed into a prime (77692733) 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 as a sum of consecutive naturals, namely, 19423183 + ... + 19423186.

Almost surely, 2^77692738 is an apocalyptic number.

77692738 is a deficient number, since it is larger than the sum of its proper divisors (38846372).

77692738 is a wasteful number, since it uses less digits than its factorization.

77692738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38846371.

The product of its digits is 889056, while the sum is 49.

The square root of 77692738 is about 8814.3484160770. The cubic root of 77692738 is about 426.7040932610.

The spelling of 77692738 in words is "seventy-seven million, six hundred ninety-two thousand, seven hundred thirty-eight".