28066944 has 32 divisors (see below), whose sum is σ = 74553840. Its totient is φ = 9355520.

The previous prime is 28066937. The next prime is 28066957. The reversal of 28066944 is 44966082.

It is a tau number, because it is divible by the number of its divisors (32).

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, 36162 + ... + 36929.

Almost surely, 2^28066944 is an apocalyptic number.

28066944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28066944 is an abundant number, since it is smaller than the sum of its proper divisors (46486896).

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

28066944 is an equidigital number, since it uses as much as digits as its factorization.

28066944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73108 (or 73096 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28066944 is about 5297.8244591530. The cubic root of 28066944 is about 303.9007062606.

The spelling of 28066944 in words is "twenty-eight million, sixty-six thousand, nine hundred forty-four".