28091452 has 12 divisors (see below), whose sum is σ = 49782880. Its totient is φ = 13867776.

The previous prime is 28091449. The next prime is 28091467. The reversal of 28091452 is 25419082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44133 + ... + 44764.

Almost surely, 2^28091452 is an apocalyptic number.

It is an amenable number.

28091452 is a deficient number, since it is larger than the sum of its proper divisors (21691428).

28091452 is a wasteful number, since it uses less digits than its factorization.

28091452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88980 (or 88978 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 28091452 is about 5300.1369793619. The cubic root of 28091452 is about 303.9891356921.

The spelling of 28091452 in words is "twenty-eight million, ninety-one thousand, four hundred fifty-two".