42728927 has 4 divisors (see below), whose sum is σ = 42839160. Its totient is φ = 42618696.

The previous prime is 42728899. The next prime is 42728941. The reversal of 42728927 is 72982724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42728927 - 2⁶ = 42728863 is a prime.

It is a super-2 number, since 2×42728927² = 3651522405142658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42728827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54533 + ... + 55310.

It is an arithmetic number, because the mean of its divisors is an integer number (10709790).

Almost surely, 2^42728927 is an apocalyptic number.

42728927 is a deficient number, since it is larger than the sum of its proper divisors (110233).

42728927 is a wasteful number, since it uses less digits than its factorization.

42728927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110232.

The product of its digits is 112896, while the sum is 41.

The square root of 42728927 is about 6536.7367240849. The cubic root of 42728927 is about 349.6020701972.

The spelling of 42728927 in words is "forty-two million, seven hundred twenty-eight thousand, nine hundred twenty-seven".