77897118 has 16 divisors (see below), whose sum is σ = 167778576. Its totient is φ = 23968320.

The previous prime is 77897107. The next prime is 77897119. The reversal of 77897118 is 81179877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77897119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499263 + ... + 499418.

It is an arithmetic number, because the mean of its divisors is an integer number (10486161).

Almost surely, 2^77897118 is an apocalyptic number.

77897118 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

77897118 is an abundant number, since it is smaller than the sum of its proper divisors (89881458).

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

77897118 is a wasteful number, since it uses less digits than its factorization.

77897118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998699.

The product of its digits is 197568, while the sum is 48.

The square root of 77897118 is about 8825.9343981247. The cubic root of 77897118 is about 427.0779309558.

The spelling of 77897118 in words is "seventy-seven million, eight hundred ninety-seven thousand, one hundred eighteen".