28666956 has 12 divisors (see below), whose sum is σ = 66889592. Its totient is φ = 9555648.

The previous prime is 28666951. The next prime is 28666969. The reversal of 28666956 is 65966682.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28666951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194445 + ... + 1194468.

Almost surely, 2^28666956 is an apocalyptic number.

It is an amenable number.

28666956 is an abundant number, since it is smaller than the sum of its proper divisors (38222636).

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

28666956 is a wasteful number, since it uses less digits than its factorization.

28666956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388920 (or 2388918 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 28666956 is about 5354.1531543280. The cubic root of 28666956 is about 306.0510402280.

The spelling of 28666956 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred fifty-six".