28502741 has 4 divisors (see below), whose sum is σ = 28589184. Its totient is φ = 28416300.

The previous prime is 28502731. The next prime is 28502753. The reversal of 28502741 is 14720582.

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-28502741 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 (28502701) 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, 42725 + ... + 43386.

It is an arithmetic number, because the mean of its divisors is an integer number (7147296).

Almost surely, 2^28502741 is an apocalyptic number.

It is an amenable number.

28502741 is a deficient number, since it is larger than the sum of its proper divisors (86443).

28502741 is an equidigital number, since it uses as much as digits as its factorization.

28502741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86442.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28502741 is about 5338.7958380144. The cubic root of 28502741 is about 305.4655293471.

The spelling of 28502741 in words is "twenty-eight million, five hundred two thousand, seven hundred forty-one".