28219467 has 6 divisors (see below), whose sum is σ = 37638228. Its totient is φ = 18806844.

The previous prime is 28219463. The next prime is 28219487. The reversal of 28219467 is 76491282.

It is not a de Polignac number, because 28219467 - 2² = 28219463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28219463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7668 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (6273038).

Almost surely, 2^28219467 is an apocalyptic number.

28219467 is a deficient number, since it is larger than the sum of its proper divisors (9418761).

28219467 is an frugal number, since it uses more digits than its factorization.

28219467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137 (or 3070 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 28219467 is about 5312.1998268137. The cubic root of 28219467 is about 304.4502036500.

The spelling of 28219467 in words is "twenty-eight million, two hundred nineteen thousand, four hundred sixty-seven".