28111452 has 24 divisors (see below), whose sum is σ = 66990336. Its totient is φ = 9170928.

The previous prime is 28111417. The next prime is 28111459. The reversal of 28111452 is 25411182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28111459) 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, 24358 + ... + 25485.

It is an arithmetic number, because the mean of its divisors is an integer number (2791264).

Almost surely, 2^28111452 is an apocalyptic number.

It is an amenable number.

28111452 is an abundant number, since it is smaller than the sum of its proper divisors (38878884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28111452 is a wasteful number, since it uses less digits than its factorization.

28111452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49897 (or 49895 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 28111452 is about 5302.0233873494. The cubic root of 28111452 is about 304.0612613151.

The spelling of 28111452 in words is "twenty-eight million, one hundred eleven thousand, four hundred fifty-two".