28447532 has 12 divisors (see below), whose sum is σ = 49837536. Its totient is φ = 14208240.

The previous prime is 28447493. The next prime is 28447537. The reversal of 28447532 is 23574482.

It is a junction number, because it is equal to n+sod(n) for n = 28447492 and 28447501.

It is not an unprimeable number, because it can be changed into a prime (28447537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (4153128).

Almost surely, 2^28447532 is an apocalyptic number.

It is an amenable number.

28447532 is a deficient number, since it is larger than the sum of its proper divisors (21390004).

28447532 is a wasteful number, since it uses less digits than its factorization.

28447532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768 (or 7766 counting only the distinct ones).

The product of its digits is 53760, while the sum is 35.

The square root of 28447532 is about 5333.6227838121. The cubic root of 28447532 is about 305.2681758505.

The spelling of 28447532 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred thirty-two".