28965394191 has 8 divisors (see below), whose sum is σ = 38707706880. Its totient is φ = 19266672152.

The previous prime is 28965394187. The next prime is 28965394193. The reversal of 28965394191 is 19149356982.

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

It is a cyclic number.

It is not a de Polignac number, because 28965394191 - 2² = 28965394187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965394193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10896111 + ... + 10898768.

It is an arithmetic number, because the mean of its divisors is an integer number (4838463360).

Almost surely, 2^28965394191 is an apocalyptic number.

28965394191 is a deficient number, since it is larger than the sum of its proper divisors (9742312689).

28965394191 is a wasteful number, since it uses less digits than its factorization.

28965394191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21795325.

The product of its digits is 4199040, while the sum is 57.

The spelling of 28965394191 in words is "twenty-eight billion, nine hundred sixty-five million, three hundred ninety-four thousand, one hundred ninety-one".