65285730 has 64 divisors (see below), whose sum is σ = 181681920. Its totient is φ = 16651008.

The previous prime is 65285681. The next prime is 65285743. The reversal of 65285730 is 3758256.

65285730 is a `hidden beast` number, since 65 + 28 + 573 + 0 = 666.

65285730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954 + ... + 11466.

It is an arithmetic number, because the mean of its divisors is an integer number (2838780).

Almost surely, 2^65285730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65285730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90840960).

65285730 is an abundant number, since it is smaller than the sum of its proper divisors (116396190).

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

65285730 is a wasteful number, since it uses less digits than its factorization.

65285730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552 (or 10546 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 65285730 is about 8079.9585394976. The cubic root of 65285730 is about 402.6608644192.

The spelling of 65285730 in words is "sixty-five million, two hundred eighty-five thousand, seven hundred thirty".