77189814 has 64 divisors (see below), whose sum is σ = 190740480. Its totient is φ = 22978080.

The previous prime is 77189753. The next prime is 77189821. The reversal of 77189814 is 41898177.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77189814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19989 + ... + 23535.

It is an arithmetic number, because the mean of its divisors is an integer number (2980320).

Almost surely, 2^77189814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77189814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95370240).

77189814 is an abundant number, since it is smaller than the sum of its proper divisors (113550666).

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

77189814 is a wasteful number, since it uses less digits than its factorization.

77189814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602 (or 3596 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 77189814 is about 8785.7733865608. The cubic root of 77189814 is about 425.7813795921.

The spelling of 77189814 in words is "seventy-seven million, one hundred eighty-nine thousand, eight hundred fourteen".