729660026 has 32 divisors (see below), whose sum is σ = 1193612112. Its totient is φ = 333168640.

The previous prime is 729660023. The next prime is 729660031. The reversal of 729660026 is 620066927.

It can be written as a sum of positive squares in 8 ways, for example, as 548730625 + 180929401 = 23425^2 + 13451^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (729660023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273290 + ... + 275946.

Almost surely, 2^729660026 is an apocalyptic number.

729660026 is a deficient number, since it is larger than the sum of its proper divisors (463952086).

729660026 is a wasteful number, since it uses less digits than its factorization.

729660026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 729660026 is about 27012.2199383908. The cubic root of 729660026 is about 900.2715337068.

The spelling of 729660026 in words is "seven hundred twenty-nine million, six hundred sixty thousand, twenty-six".