78489212 has 12 divisors (see below), whose sum is σ = 137418960. Its totient is φ = 39226656.

The previous prime is 78489181. The next prime is 78489217. The reversal of 78489212 is 21298487.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78489212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78489217) 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, 12464 + ... + 17672.

It is an arithmetic number, because the mean of its divisors is an integer number (11451580).

Almost surely, 2^78489212 is an apocalyptic number.

It is an amenable number.

78489212 is a deficient number, since it is larger than the sum of its proper divisors (58929748).

78489212 is a wasteful number, since it uses less digits than its factorization.

78489212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980 (or 8978 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 78489212 is about 8859.4137503562. The cubic root of 78489212 is about 428.1572703542.

The spelling of 78489212 in words is "seventy-eight million, four hundred eighty-nine thousand, two hundred twelve".