65804040 has 48 divisors (see below), whose sum is σ = 213864300. Its totient is φ = 17547648.

The previous prime is 65804027. The next prime is 65804047. The reversal of 65804040 is 4040856.

65804040 is a `hidden beast` number, since 6 + 580 + 40 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64545156 + 1258884 = 8034^2 + 1122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65803995 and 65804013.

It is not an unprimeable number, because it can be changed into a prime (65804047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91035 + ... + 91754.

Almost surely, 2^65804040 is an apocalyptic number.

65804040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65804040 is an abundant number, since it is smaller than the sum of its proper divisors (148060260).

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

65804040 is a wasteful number, since it uses less digits than its factorization.

65804040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182806 (or 182799 counting only the distinct ones).

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

The square root of 65804040 is about 8111.9689348518. The cubic root of 65804040 is about 403.7236452683.

Adding to 65804040 its reverse (4040856), we get a palindrome (69844896).

The spelling of 65804040 in words is "sixty-five million, eight hundred four thousand, forty".