63435440 has 40 divisors (see below), whose sum is σ = 148637808. Its totient is φ = 25176320.

The previous prime is 63435419. The next prime is 63435457. The reversal of 63435440 is 4453436.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7454 + ... + 13506.

Almost surely, 2^63435440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63435440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74318904).

63435440 is an abundant number, since it is smaller than the sum of its proper divisors (85202368).

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

63435440 is a wasteful number, since it uses less digits than its factorization.

63435440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197 (or 6191 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 63435440 is about 7964.6368404341. The cubic root of 63435440 is about 398.8203578643.

Adding to 63435440 its reverse (4453436), we get a palindrome (67888876).

The spelling of 63435440 in words is "sixty-three million, four hundred thirty-five thousand, four hundred forty".