28066504 has 8 divisors (see below), whose sum is σ = 52624710. Its totient is φ = 14033248.

The previous prime is 28066459. The next prime is 28066517. The reversal of 28066504 is 40566082.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 1954404 = 5110^2 + 1398^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754149 + ... + 1754164.

Almost surely, 2^28066504 is an apocalyptic number.

It is an amenable number.

28066504 is a deficient number, since it is larger than the sum of its proper divisors (24558206).

28066504 is a wasteful number, since it uses less digits than its factorization.

28066504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508319 (or 3508315 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28066504 is about 5297.7829325105. The cubic root of 28066504 is about 303.8991181883.

The spelling of 28066504 in words is "twenty-eight million, sixty-six thousand, five hundred four".