28066764 has 24 divisors (see below), whose sum is σ = 71443008. Its totient is φ = 8505040.

The previous prime is 28066747. The next prime is 28066793. The reversal of 28066764 is 46766082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106182 + ... + 106445.

It is an arithmetic number, because the mean of its divisors is an integer number (2976792).

Almost surely, 2^28066764 is an apocalyptic number.

It is an amenable number.

28066764 is an abundant number, since it is smaller than the sum of its proper divisors (43376244).

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

28066764 is a wasteful number, since it uses less digits than its factorization.

28066764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212645 (or 212643 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 28066764 is about 5297.8074710204. The cubic root of 28066764 is about 303.9000565967.

The spelling of 28066764 in words is "twenty-eight million, sixty-six thousand, seven hundred sixty-four".