78957828 has 60 divisors (see below), whose sum is σ = 207277840. Its totient is φ = 26209008.

The previous prime is 78957821. The next prime is 78957829. The reversal of 78957828 is 82875987.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (78957821) 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 19 ways as a sum of consecutive naturals, for example, 122475 + ... + 123117.

Almost surely, 2^78957828 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 78957828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103638920).

78957828 is an abundant number, since it is smaller than the sum of its proper divisors (128320012).

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

78957828 is a wasteful number, since it uses less digits than its factorization.

78957828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1027 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 78957828 is about 8885.8217402782. The cubic root of 78957828 is about 429.0076774996.

The spelling of 78957828 in words is "seventy-eight million, nine hundred fifty-seven thousand, eight hundred twenty-eight".