65219838 has 8 divisors (see below), whose sum is σ = 130439688. Its totient is φ = 21739944.

The previous prime is 65219821. The next prime is 65219849. The reversal of 65219838 is 83891256.

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

65219838 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 65219838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5434981 + ... + 5434992.

It is an arithmetic number, because the mean of its divisors is an integer number (16304961).

Almost surely, 2^65219838 is an apocalyptic number.

65219838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65219838 is a wasteful number, since it uses less digits than its factorization.

65219838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10869978.

The product of its digits is 103680, while the sum is 42.

The square root of 65219838 is about 8075.8800139675. The cubic root of 65219838 is about 402.5253521060.

The spelling of 65219838 in words is "sixty-five million, two hundred nineteen thousand, eight hundred thirty-eight".