63438936 has 64 divisors (see below), whose sum is σ = 174769920. Its totient is φ = 19029120.

The previous prime is 63438923. The next prime is 63438937. The reversal of 63438936 is 63983436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63438937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26026 + ... + 28358.

It is an arithmetic number, because the mean of its divisors is an integer number (2730780).

Almost surely, 2^63438936 is an apocalyptic number.

63438936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63438936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87384960).

63438936 is an abundant number, since it is smaller than the sum of its proper divisors (111330984).

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

63438936 is a wasteful number, since it uses less digits than its factorization.

63438936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456 (or 2452 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The square root of 63438936 is about 7964.8563075551. The cubic root of 63438936 is about 398.8276842124.

The spelling of 63438936 in words is "sixty-three million, four hundred thirty-eight thousand, nine hundred thirty-six".