79985934 has 192 divisors, whose sum is σ = 228729600. Its totient is φ = 20575296.

The previous prime is 79985933. The next prime is 79985959. The reversal of 79985934 is 43958997.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79985933) 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 95 ways as a sum of consecutive naturals, for example, 1860117 + ... + 1860159.

It is an arithmetic number, because the mean of its divisors is an integer number (1191300).

Almost surely, 2^79985934 is an apocalyptic number.

79985934 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79985934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114364800).

79985934 is an abundant number, since it is smaller than the sum of its proper divisors (148743666).

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

79985934 is a wasteful number, since it uses less digits than its factorization.

79985934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 111 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 79985934 is about 8943.4855621284. The cubic root of 79985934 is about 430.8616829609.

The spelling of 79985934 in words is "seventy-nine million, nine hundred eighty-five thousand, nine hundred thirty-four".