78322512 has 40 divisors (see below), whose sum is σ = 202652704. Its totient is φ = 26066304.

The previous prime is 78322487. The next prime is 78322513. The reversal of 78322512 is 21522387.

It is a super-2 number, since 2×78322512² = 12268831771980288, 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 78322512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78322513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53178 + ... + 54630.

Almost surely, 2^78322512 is an apocalyptic number.

It is an amenable number.

78322512 is an abundant number, since it is smaller than the sum of its proper divisors (124330192).

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

78322512 is a wasteful number, since it uses less digits than its factorization.

78322512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587 (or 2581 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 78322512 is about 8850.0006779661. Note that the first 3 decimals coincide. The cubic root of 78322512 is about 427.8539403205.

Adding to 78322512 its reverse (21522387), we get a palindrome (99844899).

The spelling of 78322512 in words is "seventy-eight million, three hundred twenty-two thousand, five hundred twelve".