78438035 has 16 divisors (see below), whose sum is σ = 102305280. Its totient is φ = 57386880.

The previous prime is 78438013. The next prime is 78438047. The reversal of 78438035 is 53083487.

It is a happy number.

It is not a de Polignac number, because 78438035 - 2¹⁰ = 78437011 is a prime.

It is a super-2 number, since 2×78438035² = 12305050669322450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78438035.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1550 + ... + 12620.

It is an arithmetic number, because the mean of its divisors is an integer number (6394080).

Almost surely, 2^78438035 is an apocalyptic number.

78438035 is a deficient number, since it is larger than the sum of its proper divisors (23867245).

78438035 is a wasteful number, since it uses less digits than its factorization.

78438035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11198.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 78438035 is about 8856.5249957305. The cubic root of 78438035 is about 428.0641935770.

The spelling of 78438035 in words is "seventy-eight million, four hundred thirty-eight thousand, thirty-five".