78322533828 has 144 divisors (see below), whose sum is σ = 230733081600. Its totient is φ = 20240763840.

The previous prime is 78322533797. The next prime is 78322533829. The reversal of 78322533828 is 82833522387.

It is a super-2 number, since 2×78322533828² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78322533829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2003275 + ... + 2041997.

Almost surely, 2^78322533828 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 78322533828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115366540800).

78322533828 is an abundant number, since it is smaller than the sum of its proper divisors (152410547772).

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

78322533828 is a wasteful number, since it uses less digits than its factorization.

78322533828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38958 (or 38945 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The spelling of 78322533828 in words is "seventy-eight billion, three hundred twenty-two million, five hundred thirty-three thousand, eight hundred twenty-eight".