63640002 has 16 divisors (see below), whose sum is σ = 127631232. Its totient is φ = 21154800.

The previous prime is 63639997. The next prime is 63640033. The reversal of 63640002 is 20004636.

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, 12249 + ... + 16652.

It is an arithmetic number, because the mean of its divisors is an integer number (7976952).

Almost surely, 2^63640002 is an apocalyptic number.

63640002 is an abundant number, since it is smaller than the sum of its proper divisors (63991230).

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

63640002 is a wasteful number, since it uses less digits than its factorization.

63640002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29273.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 63640002 is about 7977.4683954247. The cubic root of 63640002 is about 399.2485935213.

Adding to 63640002 its reverse (20004636), we get a palindrome (83644638).

The spelling of 63640002 in words is "sixty-three million, six hundred forty thousand, two".