28252442641 has 16 divisors (see below), whose sum is σ = 28684108800. Its totient is φ = 27824935360.

The previous prime is 28252442599. The next prime is 28252442663. The reversal of 28252442641 is 14624425282.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28252442641 - 2¹³ = 28252434449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28252442594 and 28252442603.

It is not an unprimeable number, because it can be changed into a prime (28252472641) 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, 11108616 + ... + 11111158.

It is an arithmetic number, because the mean of its divisors is an integer number (1792756800).

Almost surely, 2^28252442641 is an apocalyptic number.

It is an amenable number.

28252442641 is a deficient number, since it is larger than the sum of its proper divisors (431666159).

28252442641 is a wasteful number, since it uses less digits than its factorization.

28252442641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296.

The product of its digits is 245760, while the sum is 40.

The spelling of 28252442641 in words is "twenty-eight billion, two hundred fifty-two million, four hundred forty-two thousand, six hundred forty-one".