78821022 has 32 divisors (see below), whose sum is σ = 180778752. Its totient is φ = 22443264.

The previous prime is 78820979. The next prime is 78821047. The reversal of 78821022 is 22012887.

It is a happy number.

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, 9838 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (5649336).

Almost surely, 2^78821022 is an apocalyptic number.

78821022 is an abundant number, since it is smaller than the sum of its proper divisors (101957730).

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

78821022 is a wasteful number, since it uses less digits than its factorization.

78821022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 78821022 is about 8878.1204091857. The cubic root of 78821022 is about 428.7597613850.

The spelling of 78821022 in words is "seventy-eight million, eight hundred twenty-one thousand, twenty-two".