63639240 has 192 divisors, whose sum is σ = 226540800. Its totient is φ = 14257152.

The previous prime is 63639239. The next prime is 63639259. The reversal of 63639240 is 4293636.

63639240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 464452 + ... + 464588.

It is an arithmetic number, because the mean of its divisors is an integer number (1179900).

Almost surely, 2^63639240 is an apocalyptic number.

63639240 is a gapful number since it is divisible by the number (60) 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 63639240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113270400).

63639240 is an abundant number, since it is smaller than the sum of its proper divisors (162901560).

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

63639240 is a wasteful number, since it uses less digits than its factorization.

63639240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 63639240 is about 7977.4206357694. The cubic root of 63639240 is about 399.2470000338.

The spelling of 63639240 in words is "sixty-three million, six hundred thirty-nine thousand, two hundred forty".