77706038 has 4 divisors (see below), whose sum is σ = 116559060. Its totient is φ = 38853018.

The previous prime is 77706037. The next prime is 77706043. The reversal of 77706038 is 83060777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83060777 = 1039 ⋅79943.

It is a junction number, because it is equal to n+sod(n) for n = 77705992 and 77706010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77706037) 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, 19426508 + ... + 19426511.

It is an arithmetic number, because the mean of its divisors is an integer number (29139765).

Almost surely, 2^77706038 is an apocalyptic number.

77706038 is a deficient number, since it is larger than the sum of its proper divisors (38853022).

77706038 is a wasteful number, since it uses less digits than its factorization.

77706038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38853021.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 77706038 is about 8815.1028354750. The cubic root of 77706038 is about 426.7284406272.

The spelling of 77706038 in words is "seventy-seven million, seven hundred six thousand, thirty-eight".