77868828 has 36 divisors (see below), whose sum is σ = 203625240. Its totient is φ = 25060896.

The previous prime is 77868827. The next prime is 77868839. The reversal of 77868828 is 82886877.

77868828 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

77868828 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77868827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36250 + ... + 38337.

Almost surely, 2^77868828 is an apocalyptic number.

It is an amenable number.

77868828 is an abundant number, since it is smaller than the sum of its proper divisors (125756412).

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

77868828 is a wasteful number, since it uses less digits than its factorization.

77868828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74626 (or 74621 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 77868828 is about 8824.3315894180. The cubic root of 77868828 is about 427.0262238756.

The spelling of 77868828 in words is "seventy-seven million, eight hundred sixty-eight thousand, eight hundred twenty-eight".