28938857273 has 4 divisors (see below), whose sum is σ = 29287518288. Its totient is φ = 28590196260.

The previous prime is 28938857261. The next prime is 28938857279. The reversal of 28938857273 is 37275883982.

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 28938857273 - 2¹⁶ = 28938791737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28938857279) 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, 174330383 + ... + 174330548.

It is an arithmetic number, because the mean of its divisors is an integer number (7321879572).

Almost surely, 2^28938857273 is an apocalyptic number.

It is an amenable number.

28938857273 is a deficient number, since it is larger than the sum of its proper divisors (348661015).

28938857273 is an equidigital number, since it uses as much as digits as its factorization.

28938857273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348661014.

The product of its digits is 40642560, while the sum is 62.

The spelling of 28938857273 in words is "twenty-eight billion, nine hundred thirty-eight million, eight hundred fifty-seven thousand, two hundred seventy-three".