728956129 has 8 divisors (see below), whose sum is σ = 816717888. Its totient is φ = 644776560.

The previous prime is 728956099. The next prime is 728956133. The reversal of 728956129 is 921659827.

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

It is a cyclic number.

It is not a de Polignac number, because 728956129 - 2¹⁵ = 728923361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728956159) 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, 895117 + ... + 895930.

It is an arithmetic number, because the mean of its divisors is an integer number (102089736).

Almost surely, 2^728956129 is an apocalyptic number.

It is an amenable number.

728956129 is a deficient number, since it is larger than the sum of its proper divisors (87761759).

728956129 is a wasteful number, since it uses less digits than its factorization.

728956129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791095.

The product of its digits is 544320, while the sum is 49.

The square root of 728956129 is about 26999.1875618508. The cubic root of 728956129 is about 899.9819457284.

The spelling of 728956129 in words is "seven hundred twenty-eight million, nine hundred fifty-six thousand, one hundred twenty-nine".