79985436 has 24 divisors (see below), whose sum is σ = 186904704. Its totient is φ = 26622960.

The previous prime is 79985431. The next prime is 79985441. The reversal of 79985436 is 63458997.

It is an interprime number because it is at equal distance from previous prime (79985431) and next prime (79985441).

It is a super-2 number, since 2×79985436² = 12795339944220192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79985431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4431 + ... + 13401.

It is an arithmetic number, because the mean of its divisors is an integer number (7787696).

Almost surely, 2^79985436 is an apocalyptic number.

It is an amenable number.

79985436 is an abundant number, since it is smaller than the sum of its proper divisors (106919268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79985436 is a wasteful number, since it uses less digits than its factorization.

79985436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721 (or 9719 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 79985436 is about 8943.4577205911. The cubic root of 79985436 is about 430.8607887638.

The spelling of 79985436 in words is "seventy-nine million, nine hundred eighty-five thousand, four hundred thirty-six".