28219479 has 8 divisors (see below), whose sum is σ = 38336112. Its totient is φ = 18457920.

The previous prime is 28219463. The next prime is 28219487. The reversal of 28219479 is 97491282.

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

It is not a de Polignac number, because 28219479 - 2⁴ = 28219463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28219479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28211479) 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, 88582 + ... + 88899.

It is an arithmetic number, because the mean of its divisors is an integer number (4792014).

Almost surely, 2^28219479 is an apocalyptic number.

28219479 is a deficient number, since it is larger than the sum of its proper divisors (10116633).

28219479 is a wasteful number, since it uses less digits than its factorization.

28219479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177537.

The product of its digits is 72576, while the sum is 42.

The square root of 28219479 is about 5312.2009562892. The cubic root of 28219479 is about 304.4502468046.

The spelling of 28219479 in words is "twenty-eight million, two hundred nineteen thousand, four hundred seventy-nine".