28343075 has 12 divisors (see below), whose sum is σ = 35810208. Its totient is φ = 22245600.

The previous prime is 28343071. The next prime is 28343087. The reversal of 28343075 is 57034382.

It is a happy number.

It is not a de Polignac number, because 28343075 - 2² = 28343071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28343071) 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 11 ways as a sum of consecutive naturals, for example, 9371 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (2984184).

Almost surely, 2^28343075 is an apocalyptic number.

28343075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28343075 is a deficient number, since it is larger than the sum of its proper divisors (7467133).

28343075 is a wasteful number, since it uses less digits than its factorization.

28343075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21454 (or 21449 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28343075 is about 5323.8214658270. The cubic root of 28343075 is about 304.8940777043.

The spelling of 28343075 in words is "twenty-eight million, three hundred forty-three thousand, seventy-five".