42728855 has 16 divisors (see below), whose sum is σ = 55357344. Its totient is φ = 31474560.

The previous prime is 42728843. The next prime is 42728863. The reversal of 42728855 is 55882724.

It is not a de Polignac number, because 42728855 - 2¹⁰ = 42727831 is a prime.

It is a super-2 number, since 2×42728855² = 3651510099222050, which contains 22 as substring.

It is a Duffinian number.

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, 43520 + ... + 44490.

It is an arithmetic number, because the mean of its divisors is an integer number (3459834).

Almost surely, 2^42728855 is an apocalyptic number.

42728855 is a deficient number, since it is larger than the sum of its proper divisors (12628489).

42728855 is a wasteful number, since it uses less digits than its factorization.

42728855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its digits is 179200, while the sum is 41.

The square root of 42728855 is about 6536.7312167474. The cubic root of 42728855 is about 349.6018738325.

The spelling of 42728855 in words is "forty-two million, seven hundred twenty-eight thousand, eight hundred fifty-five".