42831728 has 20 divisors (see below), whose sum is σ = 84125568. Its totient is φ = 21121920.

The previous prime is 42831713. The next prime is 42831751. The reversal of 42831728 is 82713824.

42831728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17168 + ... + 19503.

Almost surely, 2^42831728 is an apocalyptic number.

It is an amenable number.

42831728 is a deficient number, since it is larger than the sum of its proper divisors (41293840).

42831728 is a wasteful number, since it uses less digits than its factorization.

42831728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36752 (or 36746 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 42831728 is about 6544.5953274439. The cubic root of 42831728 is about 349.8822134266.

The spelling of 42831728 in words is "forty-two million, eight hundred thirty-one thousand, seven hundred twenty-eight".