28479191 has 8 divisors (see below), whose sum is σ = 30969120. Its totient is φ = 26032032.

The previous prime is 28479181. The next prime is 28479239. The reversal of 28479191 is 19197482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28479191 - 2¹⁰ = 28478167 is a prime.

It is a super-2 number, since 2×28479191² = 1622128640028962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28479161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9296 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (3871140).

Almost surely, 2^28479191 is an apocalyptic number.

28479191 is a deficient number, since it is larger than the sum of its proper divisors (2489929).

28479191 is a wasteful number, since it uses less digits than its factorization.

28479191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21385.

The product of its digits is 36288, while the sum is 41.

The square root of 28479191 is about 5336.5898287202. The cubic root of 28479191 is about 305.3813772608.

The spelling of 28479191 in words is "twenty-eight million, four hundred seventy-nine thousand, one hundred ninety-one".