1813001728 has 20 divisors (see below), whose sum is σ = 3622463460. Its totient is φ = 906500608.

The previous prime is 1813001711. The next prime is 1813001759. The reversal of 1813001728 is 8271003181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1813001728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1769998 + ... + 1771021.

It is an arithmetic number, because the mean of its divisors is an integer number (181123173).

Almost surely, 2^1813001728 is an apocalyptic number.

It is an amenable number.

1813001728 is a deficient number, since it is larger than the sum of its proper divisors (1809461732).

1813001728 is an frugal number, since it uses more digits than its factorization.

1813001728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541037 (or 3541021 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1813001728 is about 42579.3580036149. The cubic root of 1813001728 is about 1219.3622322769.

The spelling of 1813001728 in words is "one billion, eight hundred thirteen million, one thousand, seven hundred twenty-eight".