42857822 has 16 divisors (see below), whose sum is σ = 73560960. Its totient is φ = 18345048.

The previous prime is 42857821. The next prime is 42857869. The reversal of 42857822 is 22875824.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42857821) 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, 15329 + ... + 17907.

It is an arithmetic number, because the mean of its divisors is an integer number (4597560).

Almost surely, 2^42857822 is an apocalyptic number.

42857822 is a deficient number, since it is larger than the sum of its proper divisors (30703138).

42857822 is a wasteful number, since it uses less digits than its factorization.

42857822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775.

The product of its digits is 71680, while the sum is 38.

The square root of 42857822 is about 6546.5885772668. The cubic root of 42857822 is about 349.9532508989.

The spelling of 42857822 in words is "forty-two million, eight hundred fifty-seven thousand, eight hundred twenty-two".