28124401 has 8 divisors (see below), whose sum is σ = 28955808. Its totient is φ = 27300000.

The previous prime is 28124399. The next prime is 28124407. The reversal of 28124401 is 10442182.

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

It is a cyclic number.

It is not a de Polignac number, because 28124401 - 2¹ = 28124399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28124407) 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, 7026 + ... + 10276.

It is an arithmetic number, because the mean of its divisors is an integer number (3619476).

Almost surely, 2^28124401 is an apocalyptic number.

It is an amenable number.

28124401 is a deficient number, since it is larger than the sum of its proper divisors (831407).

28124401 is a wasteful number, since it uses less digits than its factorization.

28124401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 28124401 is about 5303.2443843368. The cubic root of 28124401 is about 304.1079408069.

Adding to 28124401 its reverse (10442182), we get a palindrome (38566583).

The spelling of 28124401 in words is "twenty-eight million, one hundred twenty-four thousand, four hundred one".