28145966 has 4 divisors (see below), whose sum is σ = 42218952. Its totient is φ = 14072982.

The previous prime is 28145941. The next prime is 28145977. The reversal of 28145966 is 66954182.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7036490 + ... + 7036493.

It is an arithmetic number, because the mean of its divisors is an integer number (10554738).

Almost surely, 2^28145966 is an apocalyptic number.

28145966 is a deficient number, since it is larger than the sum of its proper divisors (14072986).

28145966 is a wasteful number, since it uses less digits than its factorization.

28145966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072985.

The product of its digits is 103680, while the sum is 41.

The square root of 28145966 is about 5305.2771840876. The cubic root of 28145966 is about 304.1856480888.

The spelling of 28145966 in words is "twenty-eight million, one hundred forty-five thousand, nine hundred sixty-six".