65189380 has 36 divisors (see below), whose sum is σ = 144498060. Its totient is φ = 24700608.

The previous prime is 65189353. The next prime is 65189381. The reversal of 65189380 is 8398156.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51036736 + 14152644 = 7144^2 + 3762^2 .

It is not an unprimeable number, because it can be changed into a prime (65189381) 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, 2706 + ... + 11734.

It is an arithmetic number, because the mean of its divisors is an integer number (4013835).

Almost surely, 2^65189380 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 65189380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72249030).

65189380 is an abundant number, since it is smaller than the sum of its proper divisors (79308680).

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

65189380 is a wasteful number, since it uses less digits than its factorization.

65189380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 65189380 is about 8073.9940549891. The cubic root of 65189380 is about 402.4626818789.

The spelling of 65189380 in words is "sixty-five million, one hundred eighty-nine thousand, three hundred eighty".