63857238 has 16 divisors (see below), whose sum is σ = 128529840. Its totient is φ = 21149856.

The previous prime is 63857237. The next prime is 63857239. The reversal of 63857238 is 83275836.

It is an interprime number because it is at equal distance from previous prime (63857237) and next prime (63857239).

It is a self number, because there is not a number n which added to its sum of digits gives 63857238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63857237) 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, 32953 + ... + 34836.

It is an arithmetic number, because the mean of its divisors is an integer number (8033115).

Almost surely, 2^63857238 is an apocalyptic number.

63857238 is an abundant number, since it is smaller than the sum of its proper divisors (64672602).

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

63857238 is a wasteful number, since it uses less digits than its factorization.

63857238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67951.

The product of its digits is 241920, while the sum is 42.

The square root of 63857238 is about 7991.0723936153. The cubic root of 63857238 is about 399.7023577443.

The spelling of 63857238 in words is "sixty-three million, eight hundred fifty-seven thousand, two hundred thirty-eight".