28947369 has 16 divisors (see below), whose sum is σ = 42197760. Its totient is φ = 17505360.

The previous prime is 28947361. The next prime is 28947371. The reversal of 28947369 is 96374982.

It is not a de Polignac number, because 28947369 - 2³ = 28947361 is a prime.

It is a super-2 number, since 2×28947369² = 1675900344044322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28947361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23794 + ... + 24980.

It is an arithmetic number, because the mean of its divisors is an integer number (2637360).

Almost surely, 2^28947369 is an apocalyptic number.

It is an amenable number.

28947369 is a deficient number, since it is larger than the sum of its proper divisors (13250391).

28947369 is a wasteful number, since it uses less digits than its factorization.

28947369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940.

The product of its digits is 653184, while the sum is 48.

The square root of 28947369 is about 5380.2759222925. The cubic root of 28947369 is about 307.0457089753.

The spelling of 28947369 in words is "twenty-eight million, nine hundred forty-seven thousand, three hundred sixty-nine".