28881206 has 4 divisors (see below), whose sum is σ = 43321812. Its totient is φ = 14440602.

The previous prime is 28881163. The next prime is 28881227. The reversal of 28881206 is 60218882.

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, 7220300 + ... + 7220303.

It is an arithmetic number, because the mean of its divisors is an integer number (10830453).

Almost surely, 2^28881206 is an apocalyptic number.

28881206 is a deficient number, since it is larger than the sum of its proper divisors (14440606).

28881206 is a wasteful number, since it uses less digits than its factorization.

28881206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14440605.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 28881206 is about 5374.1237425277. The cubic root of 28881206 is about 306.8115994724.

The spelling of 28881206 in words is "twenty-eight million, eight hundred eighty-one thousand, two hundred six".