65140284 has 72 divisors (see below), whose sum is σ = 175125888. Its totient is φ = 18686880.

The previous prime is 65140249. The next prime is 65140289. The reversal of 65140284 is 48204156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46969 + ... + 48335.

It is an arithmetic number, because the mean of its divisors is an integer number (2432304).

Almost surely, 2^65140284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65140284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87562944).

65140284 is an abundant number, since it is smaller than the sum of its proper divisors (109985604).

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

65140284 is a wasteful number, since it uses less digits than its factorization.

65140284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 65140284 is about 8070.9531035684. The cubic root of 65140284 is about 402.3616210909.

The spelling of 65140284 in words is "sixty-five million, one hundred forty thousand, two hundred eighty-four".