28241501 has 4 divisors (see below), whose sum is σ = 28842432. Its totient is φ = 27640572.

The previous prime is 28241489. The next prime is 28241509. The reversal of 28241501 is 10514282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28241501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28241509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300395 + ... + 300488.

It is an arithmetic number, because the mean of its divisors is an integer number (7210608).

Almost surely, 2^28241501 is an apocalyptic number.

It is an amenable number.

28241501 is a deficient number, since it is larger than the sum of its proper divisors (600931).

28241501 is an equidigital number, since it uses as much as digits as its factorization.

28241501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600930.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28241501 is about 5314.2733275585. The cubic root of 28241501 is about 304.5294221388.

Adding to 28241501 its reverse (10514282), we get a palindrome (38755783).

The spelling of 28241501 in words is "twenty-eight million, two hundred forty-one thousand, five hundred one".