65491438 has 8 divisors (see below), whose sum is σ = 98397720. Its totient is φ = 32692200.

The previous prime is 65491421. The next prime is 65491441. The reversal of 65491438 is 83419456.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65491438.

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, 25213 + ... + 27688.

It is an arithmetic number, because the mean of its divisors is an integer number (12299715).

Almost surely, 2^65491438 is an apocalyptic number.

65491438 is a deficient number, since it is larger than the sum of its proper divisors (32906282).

65491438 is a wasteful number, since it uses less digits than its factorization.

65491438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53522.

The product of its digits is 103680, while the sum is 40.

The square root of 65491438 is about 8092.6780487055. The cubic root of 65491438 is about 403.0833340587.

The spelling of 65491438 in words is "sixty-five million, four hundred ninety-one thousand, four hundred thirty-eight".