65138936 has 16 divisors (see below), whose sum is σ = 126075840. Its totient is φ = 31518720.

The previous prime is 65138933. The next prime is 65138947. The reversal of 65138936 is 63983156.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 65138893 and 65138902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65138933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131081 + ... + 131576.

It is an arithmetic number, because the mean of its divisors is an integer number (7879740).

Almost surely, 2^65138936 is an apocalyptic number.

It is an amenable number.

65138936 is a deficient number, since it is larger than the sum of its proper divisors (60936904).

65138936 is a wasteful number, since it uses less digits than its factorization.

65138936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262694 (or 262690 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 65138936 is about 8070.8695937922. The cubic root of 65138936 is about 402.3588456081.

The spelling of 65138936 in words is "sixty-five million, one hundred thirty-eight thousand, nine hundred thirty-six".