42857864 has 16 divisors (see below), whose sum is σ = 91838400. Its totient is φ = 18367632.

The previous prime is 42857821. The next prime is 42857869. The reversal of 42857864 is 46875824.

42857864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (42857869) by changing a digit.

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, 382604 + ... + 382715.

It is an arithmetic number, because the mean of its divisors is an integer number (5739900).

Almost surely, 2^42857864 is an apocalyptic number.

It is an amenable number.

42857864 is an abundant number, since it is smaller than the sum of its proper divisors (48980536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42857864 is a wasteful number, since it uses less digits than its factorization.

42857864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765332 (or 765328 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 42857864 is about 6546.5917850436. The cubic root of 42857864 is about 349.9533652151.

The spelling of 42857864 in words is "forty-two million, eight hundred fifty-seven thousand, eight hundred sixty-four".