728789611 has 8 divisors (see below), whose sum is σ = 795803904. Its totient is φ = 661902120.

The previous prime is 728789597. The next prime is 728789623. The reversal of 728789611 is 116987827.

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

It is not a de Polignac number, because 728789611 - 2²¹ = 726692459 is a prime.

It is a super-2 number, since 2×728789611² = 1062268594203062642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728729611) 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, 19471 + ... + 42856.

It is an arithmetic number, because the mean of its divisors is an integer number (99475488).

Almost surely, 2^728789611 is an apocalyptic number.

728789611 is a deficient number, since it is larger than the sum of its proper divisors (67014293).

728789611 is a wasteful number, since it uses less digits than its factorization.

728789611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63401.

The product of its digits is 338688, while the sum is 49.

The square root of 728789611 is about 26996.1036262643. The cubic root of 728789611 is about 899.9134118343.

The spelling of 728789611 in words is "seven hundred twenty-eight million, seven hundred eighty-nine thousand, six hundred eleven".