28555966 has 4 divisors (see below), whose sum is σ = 42833952. Its totient is φ = 14277982.

The previous prime is 28555963. The next prime is 28555973. The reversal of 28555966 is 66955582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7138990 + ... + 7138993.

It is an arithmetic number, because the mean of its divisors is an integer number (10708488).

Almost surely, 2^28555966 is an apocalyptic number.

28555966 is a deficient number, since it is larger than the sum of its proper divisors (14277986).

28555966 is a wasteful number, since it uses less digits than its factorization.

28555966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14277985.

The product of its digits is 648000, while the sum is 46.

The square root of 28555966 is about 5343.7782513873. The cubic root of 28555966 is about 305.6555495883.

The spelling of 28555966 in words is "twenty-eight million, five hundred fifty-five thousand, nine hundred sixty-six".