63457218 has 48 divisors (see below), whose sum is σ = 152845056. Its totient is φ = 18863520.

The previous prime is 63457211. The next prime is 63457223. The reversal of 63457218 is 81275436.

63457218 is a `hidden beast` number, since 634 + 5 + 7 + 2 + 18 = 666.

It is not an unprimeable number, because it can be changed into a prime (63457211) 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, 7471 + ... + 13517.

It is an arithmetic number, because the mean of its divisors is an integer number (3184272).

Almost surely, 2^63457218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63457218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76422528).

63457218 is an abundant number, since it is smaller than the sum of its proper divisors (89387838).

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

63457218 is a wasteful number, since it uses less digits than its factorization.

63457218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119 (or 6116 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 63457218 is about 7966.0038915381. The cubic root of 63457218 is about 398.8659922710.

The spelling of 63457218 in words is "sixty-three million, four hundred fifty-seven thousand, two hundred eighteen".