729886690 has 32 divisors (see below), whose sum is σ = 1420035120. Its totient is φ = 268510464.

The previous prime is 729886681. The next prime is 729886711. The reversal of 729886690 is 96688927.

729886690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 158533281 + 571353409 = 12591^2 + 23903^2 .

It is a super-2 number, since 2×729886690² = 1065469160478312200, which contains 22 as substring.

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, 25876 + ... + 46144.

Almost surely, 2^729886690 is an apocalyptic number.

729886690 is a deficient number, since it is larger than the sum of its proper divisors (690148430).

729886690 is a wasteful number, since it uses less digits than its factorization.

729886690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20566.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 729886690 is about 27016.4151952105. The cubic root of 729886690 is about 900.3647451630.

The spelling of 729886690 in words is "seven hundred twenty-nine million, eight hundred eighty-six thousand, six hundred ninety".