28240006 has 4 divisors (see below), whose sum is σ = 42360012. Its totient is φ = 14120002.

The previous prime is 28239989. The next prime is 28240013. The reversal of 28240006 is 60004282.

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, 7060000 + ... + 7060003.

It is an arithmetic number, because the mean of its divisors is an integer number (10590003).

Almost surely, 2^28240006 is an apocalyptic number.

28240006 is a deficient number, since it is larger than the sum of its proper divisors (14120006).

28240006 is a wasteful number, since it uses less digits than its factorization.

28240006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14120005.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 28240006 is about 5314.1326667670. The cubic root of 28240006 is about 304.5240484924.

Adding to 28240006 its reverse (60004282), we get a palindrome (88244288).

The spelling of 28240006 in words is "twenty-eight million, two hundred forty thousand, six".