28450104491 has 8 divisors (see below), whose sum is σ = 29898540144. Its totient is φ = 27037432800.

The previous prime is 28450104479. The next prime is 28450104509. The reversal of 28450104491 is 19440105482.

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 28450104491 - 2⁶ = 28450104427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28450104691) 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, 8939360 + ... + 8942541.

It is an arithmetic number, because the mean of its divisors is an integer number (3737317518).

Almost surely, 2^28450104491 is an apocalyptic number.

28450104491 is a deficient number, since it is larger than the sum of its proper divisors (1448435653).

28450104491 is a wasteful number, since it uses less digits than its factorization.

28450104491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17881981.

The product of its (nonzero) digits is 46080, while the sum is 38.

Subtracting from 28450104491 its reverse (19440105482), we obtain a palindrome (9009999009).

The spelling of 28450104491 in words is "twenty-eight billion, four hundred fifty million, one hundred four thousand, four hundred ninety-one".