78632213 has 12 divisors (see below), whose sum is σ = 89222784. Its totient is φ = 69174600.

The previous prime is 78632209. The next prime is 78632221. The reversal of 78632213 is 31223687.

It is a happy number.

It is not a de Polignac number, because 78632213 - 2² = 78632209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78632213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78632243) 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, 6731 + ... + 14232.

It is an arithmetic number, because the mean of its divisors is an integer number (7435232).

Almost surely, 2^78632213 is an apocalyptic number.

It is an amenable number.

78632213 is a deficient number, since it is larger than the sum of its proper divisors (10590571).

78632213 is a wasteful number, since it uses less digits than its factorization.

78632213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21016 (or 21005 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 78632213 is about 8867.4806455949. The cubic root of 78632213 is about 428.4171352467.

The spelling of 78632213 in words is "seventy-eight million, six hundred thirty-two thousand, two hundred thirteen".