28137855 has 16 divisors (see below), whose sum is σ = 46978560. Its totient is φ = 14354208.

The previous prime is 28137847. The next prime is 28137877. The reversal of 28137855 is 55873182.

It is not a de Polignac number, because 28137855 - 2³ = 28137847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40435 + ... + 41124.

It is an arithmetic number, because the mean of its divisors is an integer number (2936160).

Almost surely, 2^28137855 is an apocalyptic number.

28137855 is a deficient number, since it is larger than the sum of its proper divisors (18840705).

28137855 is a wasteful number, since it uses less digits than its factorization.

28137855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81590.

The product of its digits is 67200, while the sum is 39.

The square root of 28137855 is about 5304.5127014647. The cubic root of 28137855 is about 304.1564255846.

The spelling of 28137855 in words is "twenty-eight million, one hundred thirty-seven thousand, eight hundred fifty-five".