78985071 has 32 divisors (see below), whose sum is σ = 134380800. Its totient is φ = 45347040.

The previous prime is 78985037. The next prime is 78985087. The reversal of 78985071 is 17058987.

It is not a de Polignac number, because 78985071 - 2⁶ = 78985007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78985001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1356 + ... + 12641.

It is an arithmetic number, because the mean of its divisors is an integer number (4199400).

Almost surely, 2^78985071 is an apocalyptic number.

78985071 is a deficient number, since it is larger than the sum of its proper divisors (55395729).

78985071 is a wasteful number, since it uses less digits than its factorization.

78985071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14036 (or 14030 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 78985071 is about 8887.3545557719. The cubic root of 78985071 is about 429.0570123261.

The spelling of 78985071 in words is "seventy-eight million, nine hundred eighty-five thousand, seventy-one".