28995869 has 4 divisors (see below), whose sum is σ = 33138144. Its totient is φ = 24853596.

The previous prime is 28995833. The next prime is 28995871. The reversal of 28995869 is 96859982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28995869 - 2⁸ = 28995613 is a prime.

It is a super-2 number, since 2×28995869² = 1681520838130322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28995809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071127 + ... + 2071140.

It is an arithmetic number, because the mean of its divisors is an integer number (8284536).

Almost surely, 2^28995869 is an apocalyptic number.

It is an amenable number.

28995869 is a deficient number, since it is larger than the sum of its proper divisors (4142275).

28995869 is an equidigital number, since it uses as much as digits as its factorization.

28995869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142274.

The product of its digits is 2799360, while the sum is 56.

The square root of 28995869 is about 5384.7812397534. The cubic root of 28995869 is about 307.2170936680.

The spelling of 28995869 in words is "twenty-eight million, nine hundred ninety-five thousand, eight hundred sixty-nine".