65840004 has 36 divisors (see below), whose sum is σ = 168779520. Its totient is φ = 21636720.

The previous prime is 65840003. The next prime is 65840039. The reversal of 65840004 is 40004856.

65840004 is a `hidden beast` number, since 658 + 4 + 0 + 0 + 0 + 4 = 666.

65840004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×65840004² = 8669812253440032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65840004.

It is not an unprimeable number, because it can be changed into a prime (65840003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10324 + ... + 15435.

It is an arithmetic number, because the mean of its divisors is an integer number (4688320).

Almost surely, 2^65840004 is an apocalyptic number.

It is an amenable number.

65840004 is an abundant number, since it is smaller than the sum of its proper divisors (102939516).

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

65840004 is a wasteful number, since it uses less digits than its factorization.

65840004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840 (or 25835 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 65840004 is about 8114.1853565222. The cubic root of 65840004 is about 403.7971811426.

The spelling of 65840004 in words is "sixty-five million, eight hundred forty thousand, four".