77618328 has 64 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 24101376.

The previous prime is 77618323. The next prime is 77618329. The reversal of 77618328 is 82381677.

It is a self number, because there is not a number n which added to its sum of digits gives 77618328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77618323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41101 + ... + 42947.

It is an arithmetic number, because the mean of its divisors is an integer number (3243240).

Almost surely, 2^77618328 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 77618328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103783680).

77618328 is an abundant number, since it is smaller than the sum of its proper divisors (129949032).

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

77618328 is a wasteful number, since it uses less digits than its factorization.

77618328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1972 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 77618328 is about 8810.1264463117. The cubic root of 77618328 is about 426.5678248688.

The spelling of 77618328 in words is "seventy-seven million, six hundred eighteen thousand, three hundred twenty-eight".