79985385 has 12 divisors (see below), whose sum is σ = 138641412. Its totient is φ = 42658848.

The previous prime is 79985359. The next prime is 79985419. The reversal of 79985385 is 58358997.

It can be written as a sum of positive squares in 2 ways, for example, as 9072144 + 70913241 = 3012^2 + 8421^2 .

It is not a de Polignac number, because 79985385 - 2¹² = 79981289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888682 + ... + 888771.

It is an arithmetic number, because the mean of its divisors is an integer number (11553451).

Almost surely, 2^79985385 is an apocalyptic number.

It is an amenable number.

79985385 is a deficient number, since it is larger than the sum of its proper divisors (58656027).

79985385 is a wasteful number, since it uses less digits than its factorization.

79985385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777464 (or 1777461 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 79985385 is about 8943.4548693444. The cubic root of 79985385 is about 430.8606971892.

The spelling of 79985385 in words is "seventy-nine million, nine hundred eighty-five thousand, three hundred eighty-five".