28772950189 has 4 divisors (see below), whose sum is σ = 28963499680. Its totient is φ = 28582400700.

The previous prime is 28772950187. The next prime is 28772950229. The reversal of 28772950189 is 98105927782.

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 28772950189 - 2¹ = 28772950187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28772950183) 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, 95274519 + ... + 95274820.

It is an arithmetic number, because the mean of its divisors is an integer number (7240874920).

Almost surely, 2^28772950189 is an apocalyptic number.

It is an amenable number.

28772950189 is a deficient number, since it is larger than the sum of its proper divisors (190549491).

28772950189 is a wasteful number, since it uses less digits than its factorization.

28772950189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190549490.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 28772950189 in words is "twenty-eight billion, seven hundred seventy-two million, nine hundred fifty thousand, one hundred eighty-nine".