28996866619 has 4 divisors (see below), whose sum is σ = 33139276144. Its totient is φ = 24854457096.

The previous prime is 28996866611. The next prime is 28996866649. The reversal of 28996866619 is 91666869982.

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

It is not a de Polignac number, because 28996866619 - 2³ = 28996866611 is a prime.

It is a super-2 number, since 2×28996866619² (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 (28996866611) 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, 2071204752 + ... + 2071204765.

It is an arithmetic number, because the mean of its divisors is an integer number (8284819036).

Almost surely, 2^28996866619 is an apocalyptic number.

28996866619 is a deficient number, since it is larger than the sum of its proper divisors (4142409525).

28996866619 is an equidigital number, since it uses as much as digits as its factorization.

28996866619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142409524.

The product of its digits is 120932352, while the sum is 70.

The spelling of 28996866619 in words is "twenty-eight billion, nine hundred ninety-six million, eight hundred sixty-six thousand, six hundred nineteen".