78836224 has 40 divisors (see below), whose sum is σ = 162632448. Its totient is φ = 38138880.

The previous prime is 78836221. The next prime is 78836231. The reversal of 78836224 is 42263887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78836221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13389 + ... + 18355.

Almost surely, 2^78836224 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 78836224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81316224).

78836224 is an abundant number, since it is smaller than the sum of its proper divisors (83796224).

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

78836224 is an equidigital number, since it uses as much as digits as its factorization.

78836224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 5000 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 78836224 is about 8878.9765175948. The cubic root of 78836224 is about 428.7873241965.

The spelling of 78836224 in words is "seventy-eight million, eight hundred thirty-six thousand, two hundred twenty-four".