65836840 has 32 divisors (see below), whose sum is σ = 148428000. Its totient is φ = 26282304.

The previous prime is 65836831. The next prime is 65836847. The reversal of 65836840 is 4863856.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65836793 and 65836802.

It is not an unprimeable number, because it can be changed into a prime (65836847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23431 + ... + 26089.

It is an arithmetic number, because the mean of its divisors is an integer number (4638375).

Almost surely, 2^65836840 is an apocalyptic number.

It is an amenable number.

65836840 is an abundant number, since it is smaller than the sum of its proper divisors (82591160).

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

65836840 is a wasteful number, since it uses less digits than its factorization.

65836840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 65836840 is about 8113.9903869798. The cubic root of 65836840 is about 403.7907127614.

The spelling of 65836840 in words is "sixty-five million, eight hundred thirty-six thousand, eight hundred forty".