28247379 has 8 divisors (see below), whose sum is σ = 37828560. Its totient is φ = 18748896.

The previous prime is 28247341. The next prime is 28247407. The reversal of 28247379 is 97374282.

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

It is not a de Polignac number, because 28247379 - 2¹² = 28243283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28247379.

It is not an unprimeable number, because it can be changed into a prime (28248379) 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 7 ways as a sum of consecutive naturals, for example, 19872 + ... + 21245.

It is an arithmetic number, because the mean of its divisors is an integer number (4728570).

Almost surely, 2^28247379 is an apocalyptic number.

28247379 is a deficient number, since it is larger than the sum of its proper divisors (9581181).

28247379 is a wasteful number, since it uses less digits than its factorization.

28247379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41349.

The product of its digits is 169344, while the sum is 42.

The square root of 28247379 is about 5314.8263377085. The cubic root of 28247379 is about 304.5505482559.

The spelling of 28247379 in words is "twenty-eight million, two hundred forty-seven thousand, three hundred seventy-nine".