28263075 has 12 divisors (see below), whose sum is σ = 46728408. Its totient is φ = 15073600.

The previous prime is 28263071. The next prime is 28263091. The reversal of 28263075 is 57036282.

It is not a de Polignac number, because 28263075 - 2² = 28263071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28263071) 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, 188346 + ... + 188495.

It is an arithmetic number, because the mean of its divisors is an integer number (3894034).

Almost surely, 2^28263075 is an apocalyptic number.

28263075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28263075 is a deficient number, since it is larger than the sum of its proper divisors (18465333).

28263075 is a wasteful number, since it uses less digits than its factorization.

28263075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376854 (or 376849 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28263075 is about 5316.3027566157. The cubic root of 28263075 is about 304.6069468841.

The spelling of 28263075 in words is "twenty-eight million, two hundred sixty-three thousand, seventy-five".