28973175919 has 4 divisors (see below), whose sum is σ = 29012703496. Its totient is φ = 28933648344.

The previous prime is 28973175911. The next prime is 28973176003. The reversal of 28973175919 is 91957137982.

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 28973175919 - 2³ = 28973175911 is a prime.

It is a super-2 number, since 2×28973175919² (a number of 22 digits) contains 22 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 (28973175911) 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, 19762689 + ... + 19764154.

It is an arithmetic number, because the mean of its divisors is an integer number (7253175874).

Almost surely, 2^28973175919 is an apocalyptic number.

28973175919 is a deficient number, since it is larger than the sum of its proper divisors (39527577).

28973175919 is an equidigital number, since it uses as much as digits as its factorization.

28973175919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39527576.

The product of its digits is 8573040, while the sum is 61.

The spelling of 28973175919 in words is "twenty-eight billion, nine hundred seventy-three million, one hundred seventy-five thousand, nine hundred nineteen".