28581952 has 28 divisors (see below), whose sum is σ = 64820800. Its totient is φ = 12249216.

The previous prime is 28581941. The next prime is 28581953. The reversal of 28581952 is 25918582.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (28581953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31452 + ... + 32347.

Almost surely, 2^28581952 is an apocalyptic number.

It is an amenable number.

28581952 is an abundant number, since it is smaller than the sum of its proper divisors (36238848).

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

28581952 is an equidigital number, since it uses as much as digits as its factorization.

28581952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63818 (or 63808 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 28581952 is about 5346.2091242300. The cubic root of 28581952 is about 305.7482372485.

The spelling of 28581952 in words is "twenty-eight million, five hundred eighty-one thousand, nine hundred fifty-two".