28000032 has 48 divisors (see below), whose sum is σ = 73846080. Its totient is φ = 9289472.

The previous prime is 28000031. The next prime is 28000061. The reversal of 28000032 is 23000082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 27999975 and 28000020.

It is not an unprimeable number, because it can be changed into a prime (28000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24694 + ... + 25802.

It is an arithmetic number, because the mean of its divisors is an integer number (1538460).

Almost surely, 2^28000032 is an apocalyptic number.

It is an amenable number.

28000032 is an abundant number, since it is smaller than the sum of its proper divisors (45846048).

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

28000032 is a wasteful number, since it uses less digits than its factorization.

28000032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 28000032 is about 5291.5056458441. The cubic root of 28000032 is about 303.6590128671.

The spelling of 28000032 in words is "twenty-eight million, thirty-two", and thus it is an aban number and an uban number.