78214512 has 20 divisors (see below), whose sum is σ = 202054280. Its totient is φ = 26071488.

The previous prime is 78214481. The next prime is 78214529. The reversal of 78214512 is 21541287.

It is a super-2 number, since 2×78214512² = 12235019774796288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78214512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814687 + ... + 814782.

It is an arithmetic number, because the mean of its divisors is an integer number (10102714).

Almost surely, 2^78214512 is an apocalyptic number.

It is an amenable number.

78214512 is an abundant number, since it is smaller than the sum of its proper divisors (123839768).

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

78214512 is a wasteful number, since it uses less digits than its factorization.

78214512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629480 (or 1629474 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 78214512 is about 8843.8968786390. The cubic root of 78214512 is about 427.6571919454.

Adding to 78214512 its reverse (21541287), we get a palindrome (99755799).

The spelling of 78214512 in words is "seventy-eight million, two hundred fourteen thousand, five hundred twelve".