728229590 has 32 divisors (see below), whose sum is σ = 1453433760. Its totient is φ = 260467200.

The previous prime is 728229583. The next prime is 728229599. The reversal of 728229590 is 95922827.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728229599) 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 15 ways as a sum of consecutive naturals, for example, 47555 + ... + 60974.

It is an arithmetic number, because the mean of its divisors is an integer number (45419805).

Almost surely, 2^728229590 is an apocalyptic number.

728229590 is a deficient number, since it is larger than the sum of its proper divisors (725204170).

728229590 is a wasteful number, since it uses less digits than its factorization.

728229590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108608.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 728229590 is about 26985.7293768392. The cubic root of 728229590 is about 899.6828470987.

The spelling of 728229590 in words is "seven hundred twenty-eight million, two hundred twenty-nine thousand, five hundred ninety".