28786995 has 96 divisors (see below), whose sum is σ = 57657600. Its totient is φ = 13716864.

The previous prime is 28786991. The next prime is 28786997. The reversal of 28786995 is 59968782.

It is a happy number.

It is not a de Polignac number, because 28786995 - 2² = 28786991 is a prime.

It is a super-2 number, since 2×28786995² = 1657382162260050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28786991) 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 95 ways as a sum of consecutive naturals, for example, 669444 + ... + 669486.

It is an arithmetic number, because the mean of its divisors is an integer number (600600).

Almost surely, 2^28786995 is an apocalyptic number.

28786995 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28786995 is a wasteful number, since it uses less digits than its factorization.

28786995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 28786995 is about 5365.3513398472. The cubic root of 28786995 is about 306.4776277972.

The spelling of 28786995 in words is "twenty-eight million, seven hundred eighty-six thousand, nine hundred ninety-five".