128324029 has 8 divisors (see below), whose sum is σ = 132292440. Its totient is φ = 124382016.

The previous prime is 128324023. The next prime is 128324033. The reversal of 128324029 is 920423821.

It can be written as a sum of positive squares in 4 ways, for example, as 20268004 + 108056025 = 4502^2 + 10395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128324029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128324023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3507 + ... + 16399.

It is an arithmetic number, because the mean of its divisors is an integer number (16536555).

Almost surely, 2^128324029 is an apocalyptic number.

It is an amenable number.

128324029 is a deficient number, since it is larger than the sum of its proper divisors (3968411).

128324029 is a wasteful number, since it uses less digits than its factorization.

128324029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13199.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 128324029 is about 11328.0196415790. The cubic root of 128324029 is about 504.3933230298.

It can be divided in two parts, 12832 and 4029, that added together give a palindrome (16861).

The spelling of 128324029 in words is "one hundred twenty-eight million, three hundred twenty-four thousand, twenty-nine".