78542212 has 24 divisors (see below), whose sum is σ = 157510080. Its totient is φ = 33569760.

The previous prime is 78542207. The next prime is 78542213. The reversal of 78542212 is 21224587.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78542213) by changing a digit.

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, 7287 + ... + 14497.

It is an arithmetic number, because the mean of its divisors is an integer number (6562920).

Almost surely, 2^78542212 is an apocalyptic number.

It is an amenable number.

78542212 is an abundant number, since it is smaller than the sum of its proper divisors (78967868).

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

78542212 is a wasteful number, since it uses less digits than its factorization.

78542212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611 (or 7609 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 78542212 is about 8862.4044141531. The cubic root of 78542212 is about 428.2536200265.

Adding to 78542212 its reverse (21224587), we get a palindrome (99766799).

The spelling of 78542212 in words is "seventy-eight million, five hundred forty-two thousand, two hundred twelve".