65000638 has 8 divisors (see below), whose sum is σ = 100136232. Its totient is φ = 31621896.

The previous prime is 65000633. The next prime is 65000657. The reversal of 65000638 is 83600056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65000633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439120 + ... + 439267.

It is an arithmetic number, because the mean of its divisors is an integer number (12517029).

Almost surely, 2^65000638 is an apocalyptic number.

65000638 is a deficient number, since it is larger than the sum of its proper divisors (35135594).

65000638 is a wasteful number, since it uses less digits than its factorization.

65000638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878426.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 65000638 is about 8062.2973152818. The cubic root of 65000638 is about 402.0738913536.

The spelling of 65000638 in words is "sixty-five million, six hundred thirty-eight", and thus it is an aban number.