1028729005906 has 8 divisors (see below), whose sum is σ = 1763535438720. Its totient is φ = 440883859668.

The previous prime is 1028729005901. The next prime is 1028729005919. The reversal of 1028729005906 is 6095009278201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1028729005906.

It is not an unprimeable number, because it can be changed into a prime (1028729005901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36740321626 + ... + 36740321653.

It is an arithmetic number, because the mean of its divisors is an integer number (220441929840).

Almost surely, 2^{1028729005906} is an apocalyptic number.

1028729005906 is a deficient number, since it is larger than the sum of its proper divisors (734806432814).

1028729005906 is an equidigital number, since it uses as much as digits as its factorization.

1028729005906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73480643288.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 1028729005906 in words is "one trillion, twenty-eight billion, seven hundred twenty-nine million, five thousand, nine hundred six".