28901885 has 8 divisors (see below), whose sum is σ = 34734336. Its totient is φ = 23086800.

The previous prime is 28901881. The next prime is 28901911. The reversal of 28901885 is 58810982.

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

It is not a de Polignac number, because 28901885 - 2² = 28901881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28901881) 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, 341 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (4341792).

Almost surely, 2^28901885 is an apocalyptic number.

It is an amenable number.

28901885 is a deficient number, since it is larger than the sum of its proper divisors (5832451).

28901885 is an equidigital number, since it uses as much as digits as its factorization.

28901885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 28901885 is about 5376.0473398213. The cubic root of 28901885 is about 306.8848079045.

The spelling of 28901885 in words is "twenty-eight million, nine hundred one thousand, eight hundred eighty-five".