77108386 has 4 divisors (see below), whose sum is σ = 115662582. Its totient is φ = 38554192.

The previous prime is 77108359. The next prime is 77108387. The reversal of 77108386 is 68380177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 8732025 = 8269^2 + 2955^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77108387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19277095 + ... + 19277098.

Almost surely, 2^77108386 is an apocalyptic number.

77108386 is a deficient number, since it is larger than the sum of its proper divisors (38554196).

77108386 is a wasteful number, since it uses less digits than its factorization.

77108386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38554195.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 77108386 is about 8781.1380811373. The cubic root of 77108386 is about 425.6316071333.

The spelling of 77108386 in words is "seventy-seven million, one hundred eight thousand, three hundred eighty-six".