78330852 has 18 divisors (see below), whose sum is σ = 198003078. Its totient is φ = 26110272.

The previous prime is 78330851. The next prime is 78330871. The reversal of 78330852 is 25803387.

It can be written as a sum of positive squares in only one way, i.e., 41679936 + 36650916 = 6456^2 + 6054^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×78330852² = 12271444750091808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2175857 = 78330852 / (7 + 8 + 3 + 3 + 0 + 8 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (78330851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1087893 + ... + 1087964.

It is an arithmetic number, because the mean of its divisors is an integer number (11000171).

Almost surely, 2^78330852 is an apocalyptic number.

It is an amenable number.

78330852 is an abundant number, since it is smaller than the sum of its proper divisors (119672226).

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

78330852 is a wasteful number, since it uses less digits than its factorization.

78330852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175867 (or 2175862 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 78330852 is about 8850.4718518280. The cubic root of 78330852 is about 427.8691261426.

The spelling of 78330852 in words is "seventy-eight million, three hundred thirty thousand, eight hundred fifty-two".