78445885 has 8 divisors (see below), whose sum is σ = 107582976. Its totient is φ = 53791440.

The previous prime is 78445877. The next prime is 78445897. The reversal of 78445885 is 58854487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78445885 - 2³ = 78445877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120621 + ... + 1120690.

It is an arithmetic number, because the mean of its divisors is an integer number (13447872).

Almost surely, 2^78445885 is an apocalyptic number.

It is an amenable number.

78445885 is a deficient number, since it is larger than the sum of its proper divisors (29137091).

78445885 is a wasteful number, since it uses less digits than its factorization.

78445885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241323.

The product of its digits is 1433600, while the sum is 49.

The square root of 78445885 is about 8856.9681607196. The cubic root of 78445885 is about 428.0784731792.

The spelling of 78445885 in words is "seventy-eight million, four hundred forty-five thousand, eight hundred eighty-five".