728575381 has 8 divisors (see below), whose sum is σ = 754051680. Its totient is φ = 703122672.

The previous prime is 728575369. The next prime is 728575391. The reversal of 728575381 is 183575827.

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 728575381 - 2¹¹ = 728573333 is a prime.

It is a super-2 number, since 2×728575381² = 1061644171598590322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728575321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76806 + ... + 85768.

It is an arithmetic number, because the mean of its divisors is an integer number (94256460).

Almost surely, 2^728575381 is an apocalyptic number.

It is an amenable number.

728575381 is a deficient number, since it is larger than the sum of its proper divisors (25476299).

728575381 is a wasteful number, since it uses less digits than its factorization.

728575381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11795.

The product of its digits is 470400, while the sum is 46.

The square root of 728575381 is about 26992.1355398197. The cubic root of 728575381 is about 899.8252257329.

The spelling of 728575381 in words is "seven hundred twenty-eight million, five hundred seventy-five thousand, three hundred eighty-one".