28133458019 has 4 divisors (see below), whose sum is σ = 28148496480. Its totient is φ = 28118419560.

The previous prime is 28133458013. The next prime is 28133458033. The reversal of 28133458019 is 91085433182.

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

It is a cyclic number.

It is not a de Polignac number, because 28133458019 - 2²⁰ = 28132409443 is a prime.

It is a super-2 number, since 2×28133458019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28133458013) 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, 7516424 + ... + 7520165.

It is an arithmetic number, because the mean of its divisors is an integer number (7037124120).

Almost surely, 2^28133458019 is an apocalyptic number.

28133458019 is a deficient number, since it is larger than the sum of its proper divisors (15038461).

28133458019 is a wasteful number, since it uses less digits than its factorization.

28133458019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15038460.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 28133458019 in words is "twenty-eight billion, one hundred thirty-three million, four hundred fifty-eight thousand, nineteen".