28244001 has 8 divisors (see below), whose sum is σ = 38135680. Its totient is φ = 18590832.

The previous prime is 28243973. The next prime is 28244017. The reversal of 28244001 is 10044282.

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

It is not a de Polignac number, because 28244001 - 2²¹ = 26146849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28244101) 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 7 ways as a sum of consecutive naturals, for example, 59350 + ... + 59823.

It is an arithmetic number, because the mean of its divisors is an integer number (4766960).

Almost surely, 2^28244001 is an apocalyptic number.

It is an amenable number.

28244001 is a deficient number, since it is larger than the sum of its proper divisors (9891679).

28244001 is a wasteful number, since it uses less digits than its factorization.

28244001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119255.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28244001 is about 5314.5085379553. The cubic root of 28244001 is about 304.5384077458.

Adding to 28244001 its reverse (10044282), we get a palindrome (38288283).

The spelling of 28244001 in words is "twenty-eight million, two hundred forty-four thousand, one".