78318412 has 6 divisors (see below), whose sum is σ = 137057228. Its totient is φ = 39159204.

The previous prime is 78318397. The next prime is 78318433. The reversal of 78318412 is 21481387.

It is a happy number.

It is a super-3 number, since 3×78318412³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9789798 + ... + 9789805.

Almost surely, 2^78318412 is an apocalyptic number.

It is an amenable number.

78318412 is a deficient number, since it is larger than the sum of its proper divisors (58738816).

78318412 is a wasteful number, since it uses less digits than its factorization.

78318412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19579607 (or 19579605 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 78318412 is about 8849.7690365342. The cubic root of 78318412 is about 427.8464744731.

Adding to 78318412 its reverse (21481387), we get a palindrome (99799799).

The spelling of 78318412 in words is "seventy-eight million, three hundred eighteen thousand, four hundred twelve".