729818890 has 8 divisors (see below), whose sum is σ = 1313674020. Its totient is φ = 291927552.

The previous prime is 729818879. The next prime is 729818893. The reversal of 729818890 is 98818927.

It can be written as a sum of positive squares in 2 ways, for example, as 625350049 + 104468841 = 25007^2 + 10221^2 .

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

It is a super-2 number, since 2×729818890² = 1065271224401664200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (729818893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36490935 + ... + 36490954.

Almost surely, 2^729818890 is an apocalyptic number.

729818890 is a deficient number, since it is larger than the sum of its proper divisors (583855130).

729818890 is a wasteful number, since it uses less digits than its factorization.

729818890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72981896.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 729818890 is about 27015.1603733903. The cubic root of 729818890 is about 900.3368656666.

The spelling of 729818890 in words is "seven hundred twenty-nine million, eight hundred eighteen thousand, eight hundred ninety".