78082818 has 64 divisors (see below), whose sum is σ = 182062080. Its totient is φ = 22075200.

The previous prime is 78082801. The next prime is 78082891. The reversal of 78082818 is 81828087.

It is a happy number.

It is a super-2 number, since 2×78082818² = 12193852933642248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78082818.

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, 88596 + ... + 89472.

It is an arithmetic number, because the mean of its divisors is an integer number (2844720).

Almost surely, 2^78082818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78082818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91031040).

78082818 is an abundant number, since it is smaller than the sum of its proper divisors (103979262).

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

78082818 is a wasteful number, since it uses less digits than its factorization.

78082818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its (nonzero) digits is 57344, while the sum is 42.

The square root of 78082818 is about 8836.4482683938. The cubic root of 78082818 is about 427.4170339321.

The spelling of 78082818 in words is "seventy-eight million, eighty-two thousand, eight hundred eighteen".