1028643229 has 8 divisors (see below), whose sum is σ = 1053612000. Its totient is φ = 1003925712.

The previous prime is 1028643211. The next prime is 1028643241. The reversal of 1028643229 is 9223468201.

It is a happy number.

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 1028643229 - 2⁵ = 1028643197 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 (1028643029) 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, 54514 + ... + 70915.

It is an arithmetic number, because the mean of its divisors is an integer number (131701500).

Almost surely, 2^1028643229 is an apocalyptic number.

It is an amenable number.

1028643229 is a deficient number, since it is larger than the sum of its proper divisors (24968771).

1028643229 is a wasteful number, since it uses less digits than its factorization.

1028643229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125627.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1028643229 is about 32072.4683958064. The cubic root of 1028643229 is about 1009.4580070835.

The spelling of 1028643229 in words is "one billion, twenty-eight million, six hundred forty-three thousand, two hundred twenty-nine".