65388620 has 96 divisors (see below), whose sum is σ = 159727680. Its totient is φ = 22256640.

The previous prime is 65388601. The next prime is 65388643. The reversal of 65388620 is 2688356.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235922 + ... + 236198.

It is an arithmetic number, because the mean of its divisors is an integer number (1663830).

Almost surely, 2^65388620 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 65388620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79863840).

65388620 is an abundant number, since it is smaller than the sum of its proper divisors (94339060).

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

65388620 is a wasteful number, since it uses less digits than its factorization.

65388620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 65388620 is about 8086.3230210028. The cubic root of 65388620 is about 402.8722839284.

The spelling of 65388620 in words is "sixty-five million, three hundred eighty-eight thousand, six hundred twenty".