28288995 has 16 divisors (see below), whose sum is σ = 51728640. Its totient is φ = 12932064.

The previous prime is 28288961. The next prime is 28288999. The reversal of 28288995 is 59988282.

It is not a de Polignac number, because 28288995 - 2¹³ = 28280803 is a prime.

It is a super-2 number, since 2×28288995² = 1600534476220050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28288999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134605 + ... + 134814.

It is an arithmetic number, because the mean of its divisors is an integer number (3233040).

Almost surely, 2^28288995 is an apocalyptic number.

28288995 is a deficient number, since it is larger than the sum of its proper divisors (23439645).

28288995 is a wasteful number, since it uses less digits than its factorization.

28288995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269434.

The product of its digits is 829440, while the sum is 51.

The square root of 28288995 is about 5318.7399823642. The cubic root of 28288995 is about 304.7000365387.

The spelling of 28288995 in words is "twenty-eight million, two hundred eighty-eight thousand, nine hundred ninety-five".