65638384 has 20 divisors (see below), whose sum is σ = 145342384. Its totient is φ = 28130688.

The previous prime is 65638381. The next prime is 65638393. The reversal of 65638384 is 48383656.

It is a self number, because there is not a number n which added to its sum of digits gives 65638384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65638381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292917 + ... + 293140.

Almost surely, 2^65638384 is an apocalyptic number.

It is an amenable number.

65638384 is an abundant number, since it is smaller than the sum of its proper divisors (79704000).

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

65638384 is a wasteful number, since it uses less digits than its factorization.

65638384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586072 (or 586066 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 65638384 is about 8101.7519093095. The cubic root of 65638384 is about 403.3845807584.

The spelling of 65638384 in words is "sixty-five million, six hundred thirty-eight thousand, three hundred eighty-four".