78612042 has 16 divisors (see below), whose sum is σ = 159802272. Its totient is φ = 25774320.

The previous prime is 78612019. The next prime is 78612049. The reversal of 78612042 is 24021687.

It is not an unprimeable number, because it can be changed into a prime (78612049) 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, 107028 + ... + 107759.

It is an arithmetic number, because the mean of its divisors is an integer number (9987642).

Almost surely, 2^78612042 is an apocalyptic number.

78612042 is an abundant number, since it is smaller than the sum of its proper divisors (81190230).

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

78612042 is a wasteful number, since it uses less digits than its factorization.

78612042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214853.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 78612042 is about 8866.3432146517. The cubic root of 78612042 is about 428.3804991119.

The spelling of 78612042 in words is "seventy-eight million, six hundred twelve thousand, forty-two".