77038018 has 4 divisors (see below), whose sum is σ = 115557030. Its totient is φ = 38519008.

The previous prime is 77037997. The next prime is 77038019. The reversal of 77038018 is 81083077.

It is a happy number.

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., 52664049 + 24373969 = 7257^2 + 4937^2 .

It is not an unprimeable number, because it can be changed into a prime (77038019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19259503 + ... + 19259506.

Almost surely, 2^77038018 is an apocalyptic number.

77038018 is a deficient number, since it is larger than the sum of its proper divisors (38519012).

77038018 is a wasteful number, since it uses less digits than its factorization.

77038018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38519011.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 77038018 is about 8777.1303966615. The cubic root of 77038018 is about 425.5020926408.

The spelling of 77038018 in words is "seventy-seven million, thirty-eight thousand, eighteen".