65170728 has 96 divisors (see below), whose sum is σ = 203074560. Its totient is φ = 18495360.

The previous prime is 65170723. The next prime is 65170733. The reversal of 65170728 is 82707156.

65170728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65170723) and next prime (65170733).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 65170692 and 65170701.

It is not an unprimeable number, because it can be changed into a prime (65170723) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 95926 + ... + 96602.

It is an arithmetic number, because the mean of its divisors is an integer number (2115360).

Almost surely, 2^65170728 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 65170728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101537280).

65170728 is an abundant number, since it is smaller than the sum of its proper divisors (137903832).

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

65170728 is a wasteful number, since it uses less digits than its factorization.

65170728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 65170728 is about 8072.8389058621. The cubic root of 65170728 is about 402.4242939799.

The spelling of 65170728 in words is "sixty-five million, one hundred seventy thousand, seven hundred twenty-eight".