63446440 has 16 divisors (see below), whose sum is σ = 142754580. Its totient is φ = 25378560.

The previous prime is 63446423. The next prime is 63446477. The reversal of 63446440 is 4464436.

It can be written as a sum of positive squares in 2 ways, for example, as 51294244 + 12152196 = 7162^2 + 3486^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793041 + ... + 793120.

Almost surely, 2^63446440 is an apocalyptic number.

It is an amenable number.

63446440 is an abundant number, since it is smaller than the sum of its proper divisors (79308140).

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

63446440 is a wasteful number, since it uses less digits than its factorization.

63446440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586172 (or 1586168 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 63446440 is about 7965.3273630153. The cubic root of 63446440 is about 398.8434089662.

It can be divided in two parts, 634 and 46440, that added together give a palindrome (47074).

The spelling of 63446440 in words is "sixty-three million, four hundred forty-six thousand, four hundred forty".