28340075 has 12 divisors (see below), whose sum is σ = 35341488. Its totient is φ = 22543200.

The previous prime is 28340069. The next prime is 28340083. The reversal of 28340075 is 57004382.

It is a happy number.

It is not a de Polignac number, because 28340075 - 2²⁰ = 27291499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1394 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (2945124).

Almost surely, 2^28340075 is an apocalyptic number.

28340075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28340075 is a deficient number, since it is larger than the sum of its proper divisors (7001413).

28340075 is a wasteful number, since it uses less digits than its factorization.

28340075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454 (or 6449 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28340075 is about 5323.5397058724. The cubic root of 28340075 is about 304.8833200559.

The spelling of 28340075 in words is "twenty-eight million, three hundred forty thousand, seventy-five".