28106001 has 48 divisors (see below), whose sum is σ = 52348800. Its totient is φ = 14588640.

The previous prime is 28105999. The next prime is 28106009. The reversal of 28106001 is 10060182.

It is not a de Polignac number, because 28106001 - 2¹ = 28105999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28106009) 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 47 ways as a sum of consecutive naturals, for example, 22255 + ... + 23483.

It is an arithmetic number, because the mean of its divisors is an integer number (1090600).

Almost surely, 2^28106001 is an apocalyptic number.

28106001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28106001 is a deficient number, since it is larger than the sum of its proper divisors (24242799).

28106001 is a wasteful number, since it uses less digits than its factorization.

28106001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 28106001 is about 5301.5093133937. The cubic root of 28106001 is about 304.0416068687.

Adding to 28106001 its reverse (10060182), we get a palindrome (38166183).

The spelling of 28106001 in words is "twenty-eight million, one hundred six thousand, one".