729728990 has 32 divisors (see below), whose sum is σ = 1326780000. Its totient is φ = 288957568.

The previous prime is 729728969. The next prime is 729729023. The reversal of 729728990 is 99827927.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578981 + ... + 580239.

It is an arithmetic number, because the mean of its divisors is an integer number (41461875).

Almost surely, 2^729728990 is an apocalyptic number.

729728990 is a deficient number, since it is larger than the sum of its proper divisors (597051010).

729728990 is a wasteful number, since it uses less digits than its factorization.

729728990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 729728990 is about 27013.4964415938. The cubic root of 729728990 is about 900.2998959430.

The spelling of 729728990 in words is "seven hundred twenty-nine million, seven hundred twenty-eight thousand, nine hundred ninety".