63215838 has 48 divisors (see below), whose sum is σ = 158086656. Its totient is φ = 17882640.

The previous prime is 63215837. The next prime is 63215839. The reversal of 63215838 is 83851236.

63215838 is a `hidden beast` number, since 632 + 15 + 8 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (63215837) and next prime (63215839).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63215833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10543 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (3293472).

Almost surely, 2^63215838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63215838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79043328).

63215838 is an abundant number, since it is smaller than the sum of its proper divisors (94870818).

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

63215838 is a wasteful number, since it uses less digits than its factorization.

63215838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989 (or 4986 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 63215838 is about 7950.8388236714. The cubic root of 63215838 is about 398.3596111739.

The spelling of 63215838 in words is "sixty-three million, two hundred fifteen thousand, eight hundred thirty-eight".