42728273 has 16 divisors (see below), whose sum is σ = 52206336. Its totient is φ = 34172160.

The previous prime is 42728267. The next prime is 42728291. The reversal of 42728273 is 37282724.

It is a cyclic number.

It is not a de Polignac number, because 42728273 - 2¹⁰ = 42727249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42728233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3365 + ... + 9837.

It is an arithmetic number, because the mean of its divisors is an integer number (3262896).

Almost surely, 2^42728273 is an apocalyptic number.

It is an amenable number.

42728273 is a deficient number, since it is larger than the sum of its proper divisors (9478063).

42728273 is a wasteful number, since it uses less digits than its factorization.

42728273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its digits is 37632, while the sum is 35.

The square root of 42728273 is about 6536.6866989324. The cubic root of 42728273 is about 349.6002865428.

The spelling of 42728273 in words is "forty-two million, seven hundred twenty-eight thousand, two hundred seventy-three".