65002140 has 144 divisors (see below), whose sum is σ = 235243008. Its totient is φ = 14205312.

The previous prime is 65002139. The next prime is 65002151. The reversal of 65002140 is 4120056.

It is a happy number.

65002140 is a `hidden beast` number, since 650 + 0 + 2 + 14 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27859 + ... + 30101.

It is an arithmetic number, because the mean of its divisors is an integer number (1633632).

Almost surely, 2^65002140 is an apocalyptic number.

65002140 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 65002140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117621504).

65002140 is an abundant number, since it is smaller than the sum of its proper divisors (170240868).

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

65002140 is a wasteful number, since it uses less digits than its factorization.

65002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2283 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 65002140 is about 8062.3904643722. The cubic root of 65002140 is about 402.0769882993.

Adding to 65002140 its reverse (4120056), we get a palindrome (69122196).

The spelling of 65002140 in words is "sixty-five million, two thousand, one hundred forty".