28394754840131 has 4 divisors (see below), whose sum is σ = 29055097975992. Its totient is φ = 27734411704272.

The previous prime is 28394754840107. The next prime is 28394754840161. The reversal of 28394754840131 is 13104845749382.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-28394754840131 is a prime.

It is a super-2 number, since 2×28394754840131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28394754840161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330171567866 + ... + 330171567951.

It is an arithmetic number, because the mean of its divisors is an integer number (7263774493998).

Almost surely, 2^{28394754840131} is an apocalyptic number.

28394754840131 is a deficient number, since it is larger than the sum of its proper divisors (660343135861).

28394754840131 is an equidigital number, since it uses as much as digits as its factorization.

28394754840131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660343135860.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 28394754840131 in words is "twenty-eight trillion, three hundred ninety-four billion, seven hundred fifty-four million, eight hundred forty thousand, one hundred thirty-one".