63433440 has 432 divisors, whose sum is σ = 268894080. Its totient is φ = 13547520.

The previous prime is 63433427. The next prime is 63433451. The reversal of 63433440 is 4433436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2046225 + ... + 2046255.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^63433440 is an apocalyptic number.

63433440 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 63433440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134447040).

63433440 is an abundant number, since it is smaller than the sum of its proper divisors (205460640).

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

63433440 is a wasteful number, since it uses less digits than its factorization.

63433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 63433440 is about 7964.5112844418. The cubic root of 63433440 is about 398.8161664685.

Adding to 63433440 its reverse (4433436), we get a palindrome (67866876).

The spelling of 63433440 in words is "sixty-three million, four hundred thirty-three thousand, four hundred forty".