28810001 has 8 divisors (see below), whose sum is σ = 31476000. Its totient is φ = 26151840.

The previous prime is 28809997. The next prime is 28810049. The reversal of 28810001 is 10001882.

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

It is not a de Polignac number, because 28810001 - 2² = 28809997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28810081) 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, 7925 + ... + 10973.

It is an arithmetic number, because the mean of its divisors is an integer number (3934500).

Almost surely, 2^28810001 is an apocalyptic number.

It is an amenable number.

28810001 is a deficient number, since it is larger than the sum of its proper divisors (2665999).

28810001 is a wasteful number, since it uses less digits than its factorization.

28810001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 28810001 is about 5367.4948532812. The cubic root of 28810001 is about 306.5592496875.

Adding to 28810001 its reverse (10001882), we get a palindrome (38811883).

The spelling of 28810001 in words is "twenty-eight million, eight hundred ten thousand, one".