64201440 has 96 divisors (see below), whose sum is σ = 205752960. Its totient is φ = 16822784.

The previous prime is 64201439. The next prime is 64201457. The reversal of 64201440 is 4410246.

64201440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 27187 + ... + 29453.

It is an arithmetic number, because the mean of its divisors is an integer number (2143260).

Almost surely, 2^64201440 is an apocalyptic number.

64201440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64201440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102876480).

64201440 is an abundant number, since it is smaller than the sum of its proper divisors (141551520).

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

64201440 is a wasteful number, since it uses less digits than its factorization.

64201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 64201440 is about 8012.5801088039. The cubic root of 64201440 is about 400.4192271347.

Adding to 64201440 its reverse (4410246), we get a palindrome (68611686).

The spelling of 64201440 in words is "sixty-four million, two hundred one thousand, four hundred forty".