728890090 has 16 divisors (see below), whose sum is σ = 1312754688. Its totient is φ = 291388816.

The previous prime is 728890067. The next prime is 728890091. The reversal of 728890090 is 90098827.

It is not an unprimeable number, because it can be changed into a prime (728890091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1762 + ... + 38221.

It is an arithmetic number, because the mean of its divisors is an integer number (82047168).

Almost surely, 2^728890090 is an apocalyptic number.

728890090 is a deficient number, since it is larger than the sum of its proper divisors (583864598).

728890090 is a wasteful number, since it uses less digits than its factorization.

728890090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41813.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 728890090 is about 26997.9645529066. The cubic root of 728890090 is about 899.9547672740.

The spelling of 728890090 in words is "seven hundred twenty-eight million, eight hundred ninety thousand, ninety".