79808436 has 144 divisors (see below), whose sum is σ = 230428800. Its totient is φ = 23836032.

The previous prime is 79808419. The next prime is 79808453. The reversal of 79808436 is 63480897.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (79808419) and next prime (79808453).

It is a junction number, because it is equal to n+sod(n) for n = 79808391 and 79808400.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 896680 + ... + 896768.

It is an arithmetic number, because the mean of its divisors is an integer number (1600200).

Almost surely, 2^79808436 is an apocalyptic number.

79808436 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79808436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115214400).

79808436 is an abundant number, since it is smaller than the sum of its proper divisors (150620364).

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

79808436 is a wasteful number, since it uses less digits than its factorization.

79808436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 79808436 is about 8933.5567385001. The cubic root of 79808436 is about 430.5427363515.

The spelling of 79808436 in words is "seventy-nine million, eight hundred eight thousand, four hundred thirty-six".