63634040 has 64 divisors (see below), whose sum is σ = 152388000. Its totient is φ = 23846400.

The previous prime is 63634007. The next prime is 63634057. The reversal of 63634040 is 4043636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76346 + ... + 77174.

Almost surely, 2^63634040 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 63634040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76194000).

63634040 is an abundant number, since it is smaller than the sum of its proper divisors (88753960).

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

63634040 is a wasteful number, since it uses less digits than its factorization.

63634040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 63634040 is about 7977.0947092284. The cubic root of 63634040 is about 399.2361255013.

Adding to 63634040 its reverse (4043636), we get a palindrome (67677676).

The spelling of 63634040 in words is "sixty-three million, six hundred thirty-four thousand, forty".