28732241 has 4 divisors (see below), whose sum is σ = 28745652. Its totient is φ = 28718832.

The previous prime is 28732219. The next prime is 28732259. The reversal of 28732241 is 14223782.

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 1274641 + 27457600 = 1129^2 + 5240^2 .

It is a cyclic number.

It is not a de Polignac number, because 28732241 - 2²² = 24537937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28732271) 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, 2690 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (7186413).

Almost surely, 2^28732241 is an apocalyptic number.

It is an amenable number.

28732241 is a deficient number, since it is larger than the sum of its proper divisors (13411).

28732241 is a wasteful number, since it uses less digits than its factorization.

28732241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13410.

The product of its digits is 5376, while the sum is 29.

The square root of 28732241 is about 5360.2463562788. The cubic root of 28732241 is about 306.2831936255.

The spelling of 28732241 in words is "twenty-eight million, seven hundred thirty-two thousand, two hundred forty-one".