28690441901 has 16 divisors (see below), whose sum is σ = 33606534528. Its totient is φ = 24202214400.

The previous prime is 28690441889. The next prime is 28690441931. The reversal of 28690441901 is 10914409682.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28690441901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690441931) 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 15 ways as a sum of consecutive naturals, for example, 1067180 + ... + 1093733.

It is an arithmetic number, because the mean of its divisors is an integer number (2100408408).

Almost surely, 2^28690441901 is an apocalyptic number.

It is an amenable number.

28690441901 is a deficient number, since it is larger than the sum of its proper divisors (4916092627).

28690441901 is a wasteful number, since it uses less digits than its factorization.

28690441901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161012.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 28690441901 in words is "twenty-eight billion, six hundred ninety million, four hundred forty-one thousand, nine hundred one".