28249995 has 16 divisors (see below), whose sum is σ = 45269280. Its totient is φ = 15043584.

The previous prime is 28249993. The next prime is 28249999. The reversal of 28249995 is 59994282.

It is a happy number.

It is not a de Polignac number, because 28249995 - 2¹ = 28249993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28249993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14011 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (2829330).

Almost surely, 2^28249995 is an apocalyptic number.

28249995 is a deficient number, since it is larger than the sum of its proper divisors (17019285).

28249995 is a wasteful number, since it uses less digits than its factorization.

28249995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894.

The product of its digits is 466560, while the sum is 48.

The square root of 28249995 is about 5315.0724360069. The cubic root of 28249995 is about 304.5599494778.

The spelling of 28249995 in words is "twenty-eight million, two hundred forty-nine thousand, nine hundred ninety-five".