79129530 has 72 divisors (see below), whose sum is σ = 210361788. Its totient is φ = 20636928.

The previous prime is 79129513. The next prime is 79129537. The reversal of 79129530 is 3592197.

It can be written as a sum of positive squares in 6 ways, for example, as 24532209 + 54597321 = 4953^2 + 7389^2 .

It is a super-2 number, since 2×79129530² = 12522965036041800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79129537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 252654 + ... + 252966.

Almost surely, 2^79129530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79129530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105180894).

79129530 is an abundant number, since it is smaller than the sum of its proper divisors (131232258).

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

79129530 is a wasteful number, since it uses less digits than its factorization.

79129530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 79129530 is about 8895.4780647248. The cubic root of 79129530 is about 429.3184262781.

The spelling of 79129530 in words is "seventy-nine million, one hundred twenty-nine thousand, five hundred thirty".