78899828 has 48 divisors (see below), whose sum is σ = 163054080. Its totient is φ = 32707584.

The previous prime is 78899813. The next prime is 78899831. The reversal of 78899828 is 82899887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116900 + ... + 117572.

It is an arithmetic number, because the mean of its divisors is an integer number (3396960).

Almost surely, 2^78899828 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 78899828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81527040).

78899828 is an abundant number, since it is smaller than the sum of its proper divisors (84154252).

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

78899828 is a wasteful number, since it uses less digits than its factorization.

78899828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 59.

The square root of 78899828 is about 8882.5575145900. The cubic root of 78899828 is about 428.9026064719.

Adding to 78899828 its sum of digits (59), we get a palindrome (78899887).

The spelling of 78899828 in words is "seventy-eight million, eight hundred ninety-nine thousand, eight hundred twenty-eight".