28180452 has 12 divisors (see below), whose sum is σ = 65754416. Its totient is φ = 9393480.

The previous prime is 28180393. The next prime is 28180459. The reversal of 28180452 is 25408182.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28180459) 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, 1174174 + ... + 1174197.

Almost surely, 2^28180452 is an apocalyptic number.

It is an amenable number.

28180452 is an abundant number, since it is smaller than the sum of its proper divisors (37573964).

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

28180452 is a wasteful number, since it uses less digits than its factorization.

28180452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348378 (or 2348376 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28180452 is about 5308.5263491858. The cubic root of 28180452 is about 304.3098324308.

The spelling of 28180452 in words is "twenty-eight million, one hundred eighty thousand, four hundred fifty-two".