28219271 has 8 divisors (see below), whose sum is σ = 29459424. Its totient is φ = 27004320.

The previous prime is 28219211. The next prime is 28219277. The reversal of 28219271 is 17291282.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28219271 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 (28219277) 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, 3995 + ... + 8508.

It is an arithmetic number, because the mean of its divisors is an integer number (3682428).

Almost surely, 2^28219271 is an apocalyptic number.

28219271 is a deficient number, since it is larger than the sum of its proper divisors (1240153).

28219271 is a wasteful number, since it uses less digits than its factorization.

28219271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12601.

The product of its digits is 4032, while the sum is 32.

The square root of 28219271 is about 5312.1813786805. The cubic root of 28219271 is about 304.4494987893.

The spelling of 28219271 in words is "twenty-eight million, two hundred nineteen thousand, two hundred seventy-one".