77871018 has 32 divisors (see below), whose sum is σ = 159776064. Its totient is φ = 25293312.

The previous prime is 77871007. The next prime is 77871019. The reversal of 77871018 is 81017877.

It is not an unprimeable number, because it can be changed into a prime (77871019) 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 15 ways as a sum of consecutive naturals, for example, 37996 + ... + 39992.

It is an arithmetic number, because the mean of its divisors is an integer number (4993002).

Almost surely, 2^77871018 is an apocalyptic number.

77871018 is an abundant number, since it is smaller than the sum of its proper divisors (81905046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77871018 is a wasteful number, since it uses less digits than its factorization.

77871018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 21952, while the sum is 39.

The square root of 77871018 is about 8824.4556772642. The cubic root of 77871018 is about 427.0302270978.

The spelling of 77871018 in words is "seventy-seven million, eight hundred seventy-one thousand, eighteen".