728112129 has 16 divisors (see below), whose sum is σ = 1022484480. Its totient is φ = 459602640.

The previous prime is 728112113. The next prime is 728112137. The reversal of 728112129 is 921211827.

It is not a de Polignac number, because 728112129 - 2⁴ = 728112113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728112129.

It is not an unprimeable number, because it can be changed into a prime (728112169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191404 + ... + 195170.

It is an arithmetic number, because the mean of its divisors is an integer number (63905280).

Almost surely, 2^728112129 is an apocalyptic number.

It is an amenable number.

728112129 is a deficient number, since it is larger than the sum of its proper divisors (294372351).

728112129 is a wasteful number, since it uses less digits than its factorization.

728112129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its digits is 4032, while the sum is 33.

The square root of 728112129 is about 26983.5529350751. The cubic root of 728112129 is about 899.6344725518.

The spelling of 728112129 in words is "seven hundred twenty-eight million, one hundred twelve thousand, one hundred twenty-nine".