571428638 has 16 divisors (see below), whose sum is σ = 938026224. Its totient is φ = 258917760.

The previous prime is 571428631. The next prime is 571428659. The reversal of 571428638 is 836824175.

571428638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (571428631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33995 + ... + 47942.

It is an arithmetic number, because the mean of its divisors is an integer number (58626639).

Almost surely, 2^571428638 is an apocalyptic number.

571428638 is a deficient number, since it is larger than the sum of its proper divisors (366597586).

571428638 is a wasteful number, since it uses less digits than its factorization.

571428638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82267.

The product of its digits is 322560, while the sum is 44.

The square root of 571428638 is about 23904.5735791292. The cubic root of 571428638 is about 829.8265655912.

The spelling of 571428638 in words is "five hundred seventy-one million, four hundred twenty-eight thousand, six hundred thirty-eight".