78435042 has 64 divisors (see below), whose sum is σ = 195022080. Its totient is φ = 20514816.

The previous prime is 78435031. The next prime is 78435067. The reversal of 78435042 is 24053487.

It is a junction number, because it is equal to n+sod(n) for n = 78434994 and 78435012.

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 31 ways as a sum of consecutive naturals, for example, 24934 + ... + 27902.

It is an arithmetic number, because the mean of its divisors is an integer number (3047220).

Almost surely, 2^78435042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78435042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97511040).

78435042 is an abundant number, since it is smaller than the sum of its proper divisors (116587038).

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

78435042 is a wasteful number, since it uses less digits than its factorization.

78435042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 78435042 is about 8856.3560226540. The cubic root of 78435042 is about 428.0587488867.

The spelling of 78435042 in words is "seventy-eight million, four hundred thirty-five thousand, forty-two".