28942032791 has 8 divisors (see below), whose sum is σ = 34143596544. Its totient is φ = 24007215960.

The previous prime is 28942032781. The next prime is 28942032797. The reversal of 28942032791 is 19723024982.

It is a happy number.

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

It is not a de Polignac number, because 28942032791 - 2²⁶ = 28874923927 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 (28942032797) 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, 66686495 + ... + 66686928.

It is an arithmetic number, because the mean of its divisors is an integer number (4267949568).

Almost surely, 2^28942032791 is an apocalyptic number.

28942032791 is a deficient number, since it is larger than the sum of its proper divisors (5201563753).

28942032791 is a wasteful number, since it uses less digits than its factorization.

28942032791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133373461.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 28942032791 in words is "twenty-eight billion, nine hundred forty-two million, thirty-two thousand, seven hundred ninety-one".