78443212 has 6 divisors (see below), whose sum is σ = 137275628. Its totient is φ = 39221604.

The previous prime is 78443207. The next prime is 78443251. The reversal of 78443212 is 21234487.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9805398 + ... + 9805405.

Almost surely, 2^78443212 is an apocalyptic number.

It is an amenable number.

78443212 is a deficient number, since it is larger than the sum of its proper divisors (58832416).

78443212 is a wasteful number, since it uses less digits than its factorization.

78443212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19610807 (or 19610805 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 78443212 is about 8856.8172612965. The cubic root of 78443212 is about 428.0736109452.

Adding to 78443212 its reverse (21234487), we get a palindrome (99677699).

The spelling of 78443212 in words is "seventy-eight million, four hundred forty-three thousand, two hundred twelve".