65380280 has 64 divisors (see below), whose sum is σ = 169827840. Its totient is φ = 22188672.

The previous prime is 65380267. The next prime is 65380291. The reversal of 65380280 is 8208356.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27707 + ... + 29973.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^65380280 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 65380280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84913920).

65380280 is an abundant number, since it is smaller than the sum of its proper divisors (104447560).

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

65380280 is a wasteful number, since it uses less digits than its factorization.

65380280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 65380280 is about 8085.8073190004. The cubic root of 65380280 is about 402.8551550677.

The spelling of 65380280 in words is "sixty-five million, three hundred eighty thousand, two hundred eighty".