728101109 has 24 divisors (see below), whose sum is σ = 823152960. Its totient is φ = 642041856.

The previous prime is 728101097. The next prime is 728101117. The reversal of 728101109 is 901101827.

It is not a de Polignac number, because 728101109 - 2⁴ = 728101093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728101139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531944 + ... + 533310.

It is an arithmetic number, because the mean of its divisors is an integer number (34298040).

Almost surely, 2^728101109 is an apocalyptic number.

It is an amenable number.

728101109 is a deficient number, since it is larger than the sum of its proper divisors (95051851).

728101109 is a wasteful number, since it uses less digits than its factorization.

728101109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 728101109 is about 26983.3487358408. The cubic root of 728101109 is about 899.6299338636.

The spelling of 728101109 in words is "seven hundred twenty-eight million, one hundred one thousand, one hundred nine".