28956194729 has 32 divisors (see below), whose sum is σ = 36545955840. Its totient is φ = 22287024000.

The previous prime is 28956194719. The next prime is 28956194749. The reversal of 28956194729 is 92749165982.

It is a cyclic number.

It is not a de Polignac number, because 28956194729 - 2⁴ = 28956194713 is a prime.

It is a super-2 number, since 2×28956194729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28956194719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2074277 + ... + 2088189.

It is an arithmetic number, because the mean of its divisors is an integer number (1142061120).

Almost surely, 2^28956194729 is an apocalyptic number.

It is an amenable number.

28956194729 is a deficient number, since it is larger than the sum of its proper divisors (7589761111).

28956194729 is a wasteful number, since it uses less digits than its factorization.

28956194729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14261.

The product of its digits is 19595520, while the sum is 62.

The spelling of 28956194729 in words is "twenty-eight billion, nine hundred fifty-six million, one hundred ninety-four thousand, seven hundred twenty-nine".