65003040 has 192 divisors, whose sum is σ = 233694720. Its totient is φ = 16865280.

The previous prime is 65003033. The next prime is 65003041. The reversal of 65003040 is 4030056.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65003041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176937 + ... + 177303.

It is an arithmetic number, because the mean of its divisors is an integer number (1217160).

Almost surely, 2^65003040 is an apocalyptic number.

65003040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65003040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116847360).

65003040 is an abundant number, since it is smaller than the sum of its proper divisors (168691680).

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

65003040 is a wasteful number, since it uses less digits than its factorization.

65003040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 65003040 is about 8062.4462788908. The cubic root of 65003040 is about 402.0788439696.

Adding to 65003040 its reverse (4030056), we get a palindrome (69033096).

The spelling of 65003040 in words is "sixty-five million, three thousand, forty".