28352641 has 4 divisors (see below), whose sum is σ = 28671300. Its totient is φ = 28033984.

The previous prime is 28352603. The next prime is 28352647. The reversal of 28352641 is 14625382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18524416 + 9828225 = 4304^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 28352641 - 2¹⁵ = 28319873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28352647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159196 + ... + 159373.

It is an arithmetic number, because the mean of its divisors is an integer number (7167825).

Almost surely, 2^28352641 is an apocalyptic number.

It is an amenable number.

28352641 is a deficient number, since it is larger than the sum of its proper divisors (318659).

28352641 is an equidigital number, since it uses as much as digits as its factorization.

28352641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318658.

The product of its digits is 11520, while the sum is 31.

The square root of 28352641 is about 5324.7198048348. The cubic root of 28352641 is about 304.9283751906.

It can be divided in two parts, 2835 and 2641, that added together give a square (5476 = 74²).

The spelling of 28352641 in words is "twenty-eight million, three hundred fifty-two thousand, six hundred forty-one".