728357131330 has 8 divisors (see below), whose sum is σ = 1311042836412. Its totient is φ = 291342852528.

The previous prime is 728357131309. The next prime is 728357131343. The reversal of 728357131330 is 33131753827.

728357131330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 724658910361 + 3698220969 = 851269^2 + 60813^2 .

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

It is a super-2 number, since 2×728357131330² (a number of 25 digits) contains 22 as substring.

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, 36417856557 + ... + 36417856576.

Almost surely, 2^728357131330 is an apocalyptic number.

728357131330 is a deficient number, since it is larger than the sum of its proper divisors (582685705082).

728357131330 is a wasteful number, since it uses less digits than its factorization.

728357131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72835713140.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 728357131330 in words is "seven hundred twenty-eight billion, three hundred fifty-seven million, one hundred thirty-one thousand, three hundred thirty".