729342928 has 20 divisors (see below), whose sum is σ = 1418363460. Its totient is φ = 363313664.

The previous prime is 729342919. The next prime is 729342937. The reversal of 729342928 is 829243927.

It is an interprime number because it is at equal distance from previous prime (729342919) and next prime (729342937).

It can be written as a sum of positive squares in 2 ways, for example, as 318551104 + 410791824 = 17848^2 + 20268^2 .

It is a super-2 number, since 2×729342928² = 1063882213247226368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80425 + ... + 89032.

It is an arithmetic number, because the mean of its divisors is an integer number (70918173).

Almost surely, 2^729342928 is an apocalyptic number.

It is an amenable number.

729342928 is a deficient number, since it is larger than the sum of its proper divisors (689020532).

729342928 is a wasteful number, since it uses less digits than its factorization.

729342928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169734 (or 169728 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 729342928 is about 27006.3497718592. The cubic root of 729342928 is about 900.1411005111.

Subtracting 729342928 from its reverse (829243927), we obtain a palindrome (99900999).

The spelling of 729342928 in words is "seven hundred twenty-nine million, three hundred forty-two thousand, nine hundred twenty-eight".