729873538 has 4 divisors (see below), whose sum is σ = 1094810310. Its totient is φ = 364936768.

The previous prime is 729873533. The next prime is 729873541. The reversal of 729873538 is 835378927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 587238289 + 142635249 = 24233^2 + 11943^2 .

It is not an unprimeable number, because it can be changed into a prime (729873533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182468383 + ... + 182468386.

Almost surely, 2^729873538 is an apocalyptic number.

729873538 is a deficient number, since it is larger than the sum of its proper divisors (364936772).

729873538 is a wasteful number, since it uses less digits than its factorization.

729873538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364936771.

The product of its digits is 2540160, while the sum is 52.

The square root of 729873538 is about 27016.1717865430. The cubic root of 729873538 is about 900.3593371691.

The spelling of 729873538 in words is "seven hundred twenty-nine million, eight hundred seventy-three thousand, five hundred thirty-eight".