78281412 has 24 divisors (see below), whose sum is σ = 199262112. Its totient is φ = 23721600.

The previous prime is 78281347. The next prime is 78281431. The reversal of 78281412 is 21418287.

It is a happy number.

It is a super-2 number, since 2×78281412² = 12255958929427488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 7 ways as a sum of consecutive naturals, for example, 296389 + ... + 296652.

It is an arithmetic number, because the mean of its divisors is an integer number (8302588).

Almost surely, 2^78281412 is an apocalyptic number.

It is an amenable number.

78281412 is an abundant number, since it is smaller than the sum of its proper divisors (120980700).

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

78281412 is a wasteful number, since it uses less digits than its factorization.

78281412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593059 (or 593057 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 78281412 is about 8847.6783395420. The cubic root of 78281412 is about 427.7790879641.

Adding to 78281412 its reverse (21418287), we get a palindrome (99699699).

The spelling of 78281412 in words is "seventy-eight million, two hundred eighty-one thousand, four hundred twelve".