65642438 has 8 divisors (see below), whose sum is σ = 101640000. Its totient is φ = 31762440.

The previous prime is 65642419. The next prime is 65642441. The reversal of 65642438 is 83424656.

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

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, 529313 + ... + 529436.

It is an arithmetic number, because the mean of its divisors is an integer number (12705000).

Almost surely, 2^65642438 is an apocalyptic number.

65642438 is a deficient number, since it is larger than the sum of its proper divisors (35997562).

65642438 is a wasteful number, since it uses less digits than its factorization.

65642438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058782.

The product of its digits is 138240, while the sum is 38.

The square root of 65642438 is about 8102.0020982471. The cubic root of 65642438 is about 403.3928852865.

The spelling of 65642438 in words is "sixty-five million, six hundred forty-two thousand, four hundred thirty-eight".