65839138 has 16 divisors (see below), whose sum is σ = 101165400. Its totient is φ = 32126976.

The previous prime is 65839127. The next prime is 65839141. The reversal of 65839138 is 83193856.

It can be written as a sum of positive squares in 4 ways, for example, as 65561409 + 277729 = 8097^2 + 527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65839094 and 65839103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11838 + ... + 16486.

Almost surely, 2^65839138 is an apocalyptic number.

65839138 is a deficient number, since it is larger than the sum of its proper divisors (35326262).

65839138 is a wasteful number, since it uses less digits than its factorization.

65839138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821.

The product of its digits is 155520, while the sum is 43.

The square root of 65839138 is about 8114.1319930107. The cubic root of 65839138 is about 403.7954107403.

The spelling of 65839138 in words is "sixty-five million, eight hundred thirty-nine thousand, one hundred thirty-eight".