77890484 has 12 divisors (see below), whose sum is σ = 155781024. Its totient is φ = 33381624.

The previous prime is 77890471. The next prime is 77890499. The reversal of 77890484 is 48409877.

77890484 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1390874 + ... + 1390929.

It is an arithmetic number, because the mean of its divisors is an integer number (12981752).

Almost surely, 2^77890484 is an apocalyptic number.

It is an amenable number.

77890484 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77890484 is a wasteful number, since it uses less digits than its factorization.

77890484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781814 (or 2781812 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 77890484 is about 8825.5585658926. The cubic root of 77890484 is about 427.0658067784.

The spelling of 77890484 in words is "seventy-seven million, eight hundred ninety thousand, four hundred eighty-four".