78821204 has 36 divisors (see below), whose sum is σ = 175049280. Its totient is φ = 30708720.

The previous prime is 78821203. The next prime is 78821213. The reversal of 78821204 is 40212887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78821203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16124 + ... + 20435.

It is an arithmetic number, because the mean of its divisors is an integer number (4862480).

Almost surely, 2^78821204 is an apocalyptic number.

It is an amenable number.

78821204 is an abundant number, since it is smaller than the sum of its proper divisors (96228076).

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

78821204 is a wasteful number, since it uses less digits than its factorization.

78821204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36588 (or 36579 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 78821204 is about 8878.1306590971. The cubic root of 78821204 is about 428.7600913910.

The spelling of 78821204 in words is "seventy-eight million, eight hundred twenty-one thousand, two hundred four".