729243890 has 8 divisors (see below), whose sum is σ = 1312639020. Its totient is φ = 291697552.

The previous prime is 729243887. The next prime is 729243913. The reversal of 729243890 is 98342927.

It can be written as a sum of positive squares in 2 ways, for example, as 721620769 + 7623121 = 26863^2 + 2761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×729243890² = 1063593302204664200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36462185 + ... + 36462204.

Almost surely, 2^729243890 is an apocalyptic number.

729243890 is a deficient number, since it is larger than the sum of its proper divisors (583395130).

729243890 is a wasteful number, since it uses less digits than its factorization.

729243890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72924396.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 729243890 is about 27004.5161037927. The cubic root of 729243890 is about 900.1003550646.

The spelling of 729243890 in words is "seven hundred twenty-nine million, two hundred forty-three thousand, eight hundred ninety".