28253522 has 16 divisors (see below), whose sum is σ = 48244032. Its totient is φ = 12283920.

The previous prime is 28253521. The next prime is 28253549. The reversal of 28253522 is 22535282.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28253521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27413 + ... + 28424.

It is an arithmetic number, because the mean of its divisors is an integer number (3015252).

Almost surely, 2^28253522 is an apocalyptic number.

28253522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28253522 is a deficient number, since it is larger than the sum of its proper divisors (19990510).

28253522 is a wasteful number, since it uses less digits than its factorization.

28253522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55873.

The product of its digits is 9600, while the sum is 29.

The square root of 28253522 is about 5315.4042179311. The cubic root of 28253522 is about 304.5726236776.

The spelling of 28253522 in words is "twenty-eight million, two hundred fifty-three thousand, five hundred twenty-two".