28012132 has 12 divisors (see below), whose sum is σ = 49060480. Its totient is φ = 13994856.

The previous prime is 28012121. The next prime is 28012133. The reversal of 28012132 is 23121082.

It is not an unprimeable number, because it can be changed into a prime (28012133) 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, 5653 + ... + 9379.

Almost surely, 2^28012132 is an apocalyptic number.

It is an amenable number.

28012132 is a deficient number, since it is larger than the sum of its proper divisors (21048348).

28012132 is a wasteful number, since it uses less digits than its factorization.

28012132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5608 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28012132 is about 5292.6488642267. The cubic root of 28012132 is about 303.7027478756.

The spelling of 28012132 in words is "twenty-eight million, twelve thousand, one hundred thirty-two".