28748441 has 4 divisors (see below), whose sum is σ = 28800612. Its totient is φ = 28696272.

The previous prime is 28748429. The next prime is 28748449. The reversal of 28748441 is 14484782.

It is a happy number.

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 5900041 + 22848400 = 2429^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 28748441 - 2¹⁰ = 28747417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28748395 and 28748404.

It is not an unprimeable number, because it can be changed into a prime (28748449) 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, 25250 + ... + 26363.

It is an arithmetic number, because the mean of its divisors is an integer number (7200153).

Almost surely, 2^28748441 is an apocalyptic number.

It is an amenable number.

28748441 is a deficient number, since it is larger than the sum of its proper divisors (52171).

28748441 is an equidigital number, since it uses as much as digits as its factorization.

28748441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52170.

The product of its digits is 57344, while the sum is 38.

The square root of 28748441 is about 5361.7572679113. The cubic root of 28748441 is about 306.3407463413.

The spelling of 28748441 in words is "twenty-eight million, seven hundred forty-eight thousand, four hundred forty-one".