28859091 has 8 divisors (see below), whose sum is σ = 38522304. Its totient is φ = 19217640.

The previous prime is 28859069. The next prime is 28859107. The reversal of 28859091 is 19095882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28859091 - 2⁵ = 28859059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28859891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (4815288).

Almost surely, 2^28859091 is an apocalyptic number.

28859091 is a deficient number, since it is larger than the sum of its proper divisors (9663213).

28859091 is an equidigital number, since it uses as much as digits as its factorization.

28859091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 28859091 is about 5372.0658037667. The cubic root of 28859091 is about 306.7332685894.

The spelling of 28859091 in words is "twenty-eight million, eight hundred fifty-nine thousand, ninety-one".