65085440 has 112 divisors (see below), whose sum is σ = 179295552. Its totient is φ = 22216704.

The previous prime is 65085439. The next prime is 65085443. The reversal of 65085440 is 4458056.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×65085440² = 8472228999987200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 65085397 and 65085406.

It is not an unprimeable number, because it can be changed into a prime (65085443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286607 + ... + 286833.

Almost surely, 2^65085440 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 65085440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89647776).

65085440 is an abundant number, since it is smaller than the sum of its proper divisors (114210112).

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

65085440 is an equidigital number, since it uses as much as digits as its factorization.

65085440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 65085440 is about 8067.5547720483. The cubic root of 65085440 is about 402.2486683714.

The spelling of 65085440 in words is "sixty-five million, eighty-five thousand, four hundred forty".