28020232 has 8 divisors (see below), whose sum is σ = 52537950. Its totient is φ = 14010112.

The previous prime is 28020229. The next prime is 28020241. The reversal of 28020232 is 23202082.

It can be written as a sum of positive squares in only one way, i.e., 17690436 + 10329796 = 4206^2 + 3214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1751257 + ... + 1751272.

Almost surely, 2^28020232 is an apocalyptic number.

It is an amenable number.

28020232 is a deficient number, since it is larger than the sum of its proper divisors (24517718).

28020232 is a wasteful number, since it uses less digits than its factorization.

28020232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502535 (or 3502531 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 28020232 is about 5293.4140212154. The cubic root of 28020232 is about 303.7320179931.

The spelling of 28020232 in words is "twenty-eight million, twenty thousand, two hundred thirty-two".