28542166 has 4 divisors (see below), whose sum is σ = 42813252. Its totient is φ = 14271082.

The previous prime is 28542139. The next prime is 28542179. The reversal of 28542166 is 66124582.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7135540 + ... + 7135543.

It is an arithmetic number, because the mean of its divisors is an integer number (10703313).

Almost surely, 2^28542166 is an apocalyptic number.

28542166 is a deficient number, since it is larger than the sum of its proper divisors (14271086).

28542166 is a wasteful number, since it uses less digits than its factorization.

28542166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14271085.

The product of its digits is 23040, while the sum is 34.

The square root of 28542166 is about 5342.4868741065. The cubic root of 28542166 is about 305.6063044646.

The spelling of 28542166 in words is "twenty-eight million, five hundred forty-two thousand, one hundred sixty-six".