1031728929 has 128 divisors (see below), whose sum is σ = 1902735360. Its totient is φ = 481075200.

The previous prime is 1031728909. The next prime is 1031728933. The reversal of 1031728929 is 9298271301.

It is not a de Polignac number, because 1031728929 - 2⁵ = 1031728897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1031728909) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14133237 + ... + 14133309.

It is an arithmetic number, because the mean of its divisors is an integer number (14865120).

Almost surely, 2^1031728929 is an apocalyptic number.

It is an amenable number.

1031728929 is a deficient number, since it is larger than the sum of its proper divisors (871006431).

1031728929 is a wasteful number, since it uses less digits than its factorization.

1031728929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1031728929 is about 32120.5374955028. The cubic root of 1031728929 is about 1010.4663823271.

It can be divided in two parts, 103172 and 8929, that added together give a triangular number (112101 = T₄₇₃).

The spelling of 1031728929 in words is "one billion, thirty-one million, seven hundred twenty-eight thousand, nine hundred twenty-nine".