77018384 has 30 divisors (see below), whose sum is σ = 154222830. Its totient is φ = 37259520.

The previous prime is 77018363. The next prime is 77018393. The reversal of 77018384 is 48381077.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 12054784 = 8060^2 + 3472^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 12872 + ... + 17880.

It is an arithmetic number, because the mean of its divisors is an integer number (5140761).

Almost surely, 2^77018384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77018384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77111415).

77018384 is an abundant number, since it is smaller than the sum of its proper divisors (77204446).

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

77018384 is a wasteful number, since it uses less digits than its factorization.

77018384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 77018384 is about 8776.0118504934. The cubic root of 77018384 is about 425.4659415813.

The spelling of 77018384 in words is "seventy-seven million, eighteen thousand, three hundred eighty-four".