79128205 has 32 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 56519424.

The previous prime is 79128199. The next prime is 79128221. The reversal of 79128205 is 50282197.

It is not a de Polignac number, because 79128205 - 2³ = 79128197 is a prime.

It is a super-3 number, since 3×79128205³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354724 + ... + 354946.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^79128205 is an apocalyptic number.

It is an amenable number.

79128205 is a deficient number, since it is larger than the sum of its proper divisors (26542451).

79128205 is a wasteful number, since it uses less digits than its factorization.

79128205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 79128205 is about 8895.4035883708. The cubic root of 79128205 is about 429.3160299958.

It can be divided in two parts, 7912820 and 5, that multiplied together give a square (39564100 = 6290²).

The spelling of 79128205 in words is "seventy-nine million, one hundred twenty-eight thousand, two hundred five".