28641444701 has 32 divisors (see below), whose sum is σ = 30725775360. Its totient is φ = 26655969600.

The previous prime is 28641444691. The next prime is 28641444731. The reversal of 28641444701 is 10744414682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28641444701 - 2²⁶ = 28574335837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28641444731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18954536 + ... + 18956046.

It is an arithmetic number, because the mean of its divisors is an integer number (960180480).

Almost surely, 2^28641444701 is an apocalyptic number.

It is an amenable number.

28641444701 is a deficient number, since it is larger than the sum of its proper divisors (2084330659).

28641444701 is a wasteful number, since it uses less digits than its factorization.

28641444701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 28641444701 in words is "twenty-eight billion, six hundred forty-one million, four hundred forty-four thousand, seven hundred one".