28449523 has 4 divisors (see below), whose sum is σ = 29054880. Its totient is φ = 27844168.

The previous prime is 28449497. The next prime is 28449529. The reversal of 28449523 is 32594482.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28449523 - 2⁹ = 28449011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28449529) 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, 302608 + ... + 302701.

It is an arithmetic number, because the mean of its divisors is an integer number (7263720).

Almost surely, 2^28449523 is an apocalyptic number.

28449523 is a deficient number, since it is larger than the sum of its proper divisors (605357).

28449523 is an equidigital number, since it uses as much as digits as its factorization.

28449523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605356.

The product of its digits is 69120, while the sum is 37.

The square root of 28449523 is about 5333.8094266668. The cubic root of 28449523 is about 305.2752974379.

The spelling of 28449523 in words is "twenty-eight million, four hundred forty-nine thousand, five hundred twenty-three".