78630828 has 24 divisors (see below), whose sum is σ = 183626688. Its totient is φ = 26188176.

The previous prime is 78630821. The next prime is 78630841. The reversal of 78630828 is 82803687.

It is a super-2 number, since 2×78630828² = 12365614223931168, 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 78630828.

It is not an unprimeable number, because it can be changed into a prime (78630821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18775 + ... + 22577.

It is an arithmetic number, because the mean of its divisors is an integer number (7651112).

Almost surely, 2^78630828 is an apocalyptic number.

It is an amenable number.

78630828 is an abundant number, since it is smaller than the sum of its proper divisors (104995860).

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

78630828 is a wasteful number, since it uses less digits than its factorization.

78630828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5533 (or 5531 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 78630828 is about 8867.4025509165. The cubic root of 78630828 is about 428.4146199026.

The spelling of 78630828 in words is "seventy-eight million, six hundred thirty thousand, eight hundred twenty-eight".