801240728 has 16 divisors (see below), whose sum is σ = 1503894480. Its totient is φ = 400202208.

The previous prime is 801240721. The next prime is 801240731. The reversal of 801240728 is 827042108.

It is a junction number, because it is equal to n+sod(n) for n = 801240694 and 801240703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801240721) 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 3 ways as a sum of consecutive naturals, for example, 44051 + ... + 59522.

It is an arithmetic number, because the mean of its divisors is an integer number (93993405).

Almost surely, 2^801240728 is an apocalyptic number.

It is an amenable number.

801240728 is a deficient number, since it is larger than the sum of its proper divisors (702653752).

801240728 is a wasteful number, since it uses less digits than its factorization.

801240728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104546 (or 104542 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 801240728 is about 28306.1959295134. The cubic root of 801240728 is about 928.7974312716.

The spelling of 801240728 in words is "eight hundred one million, two hundred forty thousand, seven hundred twenty-eight".