28139853 has 8 divisors (see below), whose sum is σ = 42879808. Its totient is φ = 16079904.

The previous prime is 28139851. The next prime is 28139857. The reversal of 28139853 is 35893182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28139853 - 2¹ = 28139851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28139851) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 669976 + ... + 670017.

It is an arithmetic number, because the mean of its divisors is an integer number (5359976).

Almost surely, 2^28139853 is an apocalyptic number.

It is an amenable number.

28139853 is a deficient number, since it is larger than the sum of its proper divisors (14739955).

28139853 is a wasteful number, since it uses less digits than its factorization.

28139853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340003.

The product of its digits is 51840, while the sum is 39.

The square root of 28139853 is about 5304.7010283333. The cubic root of 28139853 is about 304.1636245479.

The spelling of 28139853 in words is "twenty-eight million, one hundred thirty-nine thousand, eight hundred fifty-three".