28052401 has 8 divisors (see below), whose sum is σ = 31027304. Its totient is φ = 25194240.

The previous prime is 28052393. The next prime is 28052407. The reversal of 28052401 is 10425082.

It can be written as a sum of positive squares in 4 ways, for example, as 216225 + 27836176 = 465^2 + 5276^2 .

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

It is a 9-Lehmer number, since φ(28052401) divides (28052401-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 28052401 - 2³ = 28052393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28052407) 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, 28680 + ... + 29641.

It is an arithmetic number, because the mean of its divisors is an integer number (3878413).

Almost surely, 2^28052401 is an apocalyptic number.

It is an amenable number.

28052401 is a deficient number, since it is larger than the sum of its proper divisors (2974903).

28052401 is a wasteful number, since it uses less digits than its factorization.

28052401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58371.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 28052401 is about 5296.4517367762. The cubic root of 28052401 is about 303.8482080675.

Adding to 28052401 its reverse (10425082), we get a palindrome (38477483).

The spelling of 28052401 in words is "twenty-eight million, fifty-two thousand, four hundred one".