28304343 has 8 divisors (see below), whose sum is σ = 41932400. Its totient is φ = 18869544.

The previous prime is 28304327. The next prime is 28304347. The reversal of 28304343 is 34340382.

It is not a de Polignac number, because 28304343 - 2⁴ = 28304327 is a prime.

It is a super-2 number, since 2×28304343² = 1602271665323298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1048309 = 28304343 / (2 + 8 + 3 + 0 + 4 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304347) 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, 524128 + ... + 524181.

It is an arithmetic number, because the mean of its divisors is an integer number (5241550).

Almost surely, 2^28304343 is an apocalyptic number.

28304343 is a deficient number, since it is larger than the sum of its proper divisors (13628057).

28304343 is a wasteful number, since it uses less digits than its factorization.

28304343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048318 (or 1048312 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 28304343 is about 5320.1826096479. The cubic root of 28304343 is about 304.7551308805.

The spelling of 28304343 in words is "twenty-eight million, three hundred four thousand, three hundred forty-three".