63240840 has 96 divisors (see below), whose sum is σ = 221359320. Its totient is φ = 15565824.

The previous prime is 63240811. The next prime is 63240841. The reversal of 63240840 is 4804236.

63240840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 22867524 = 6354^2 + 4782^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (63240841) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2077 + ... + 11436.

Almost surely, 2^63240840 is an apocalyptic number.

63240840 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 63240840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110679660).

63240840 is an abundant number, since it is smaller than the sum of its proper divisors (158118480).

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

63240840 is a wasteful number, since it uses less digits than its factorization.

63240840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13543 (or 13536 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 63240840 is about 7952.4109551758. The cubic root of 63240840 is about 398.4121216131.

The spelling of 63240840 in words is "sixty-three million, two hundred forty thousand, eight hundred forty".