28879161133 has 4 divisors (see below), whose sum is σ = 29810747008. Its totient is φ = 27947575260.

The previous prime is 28879161121. The next prime is 28879161137. The reversal of 28879161133 is 33116197882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28879161133 - 2³³ = 20289226541 is a prime.

It is a super-4 number, since 4×28879161133⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28879161137) 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, 465792891 + ... + 465792952.

It is an arithmetic number, because the mean of its divisors is an integer number (7452686752).

Almost surely, 2^28879161133 is an apocalyptic number.

It is an amenable number.

28879161133 is a deficient number, since it is larger than the sum of its proper divisors (931585875).

28879161133 is an equidigital number, since it uses as much as digits as its factorization.

28879161133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931585874.

The product of its digits is 435456, while the sum is 49.

The spelling of 28879161133 in words is "twenty-eight billion, eight hundred seventy-nine million, one hundred sixty-one thousand, one hundred thirty-three".