78503845 has 16 divisors (see below), whose sum is σ = 107867520. Its totient is φ = 53728704.

The previous prime is 78503837. The next prime is 78503881. The reversal of 78503845 is 54830587.

It is a cyclic number.

It is not a de Polignac number, because 78503845 - 2³ = 78503837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78503798 and 78503807.

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 15 ways as a sum of consecutive naturals, for example, 19626 + ... + 23284.

It is an arithmetic number, because the mean of its divisors is an integer number (6741720).

Almost surely, 2^78503845 is an apocalyptic number.

It is an amenable number.

78503845 is a deficient number, since it is larger than the sum of its proper divisors (29363675).

78503845 is a wasteful number, since it uses less digits than its factorization.

78503845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 78503845 is about 8860.2395565808. The cubic root of 78503845 is about 428.1838762867.

The spelling of 78503845 in words is "seventy-eight million, five hundred three thousand, eight hundred forty-five".