78823628 has 72 divisors (see below), whose sum is σ = 166939920. Its totient is φ = 32438016.

The previous prime is 78823627. The next prime is 78823643. The reversal of 78823628 is 82632887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78823627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4148603 + ... + 4148621.

It is an arithmetic number, because the mean of its divisors is an integer number (2318610).

Almost surely, 2^78823628 is an apocalyptic number.

It is an amenable number.

78823628 is an abundant number, since it is smaller than the sum of its proper divisors (88116292).

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

78823628 is a wasteful number, since it uses less digits than its factorization.

78823628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 51 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 78823628 is about 8878.2671732720. The cubic root of 78823628 is about 428.7644865865.

The spelling of 78823628 in words is "seventy-eight million, eight hundred twenty-three thousand, six hundred twenty-eight".