78648212 has 6 divisors (see below), whose sum is σ = 137634378. Its totient is φ = 39324104.

The previous prime is 78648139. The next prime is 78648233. The reversal of 78648212 is 21284687.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 10023556 = 8284^2 + 3166^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9831023 + ... + 9831030.

It is an arithmetic number, because the mean of its divisors is an integer number (22939063).

Almost surely, 2^78648212 is an apocalyptic number.

It is an amenable number.

78648212 is a deficient number, since it is larger than the sum of its proper divisors (58986166).

78648212 is a wasteful number, since it uses less digits than its factorization.

78648212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19662057 (or 19662055 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 78648212 is about 8868.3827161439. The cubic root of 78648212 is about 428.4461894162.

The spelling of 78648212 in words is "seventy-eight million, six hundred forty-eight thousand, two hundred twelve".