64344240 has 80 divisors (see below), whose sum is σ = 221637600. Its totient is φ = 17157888.

The previous prime is 64344151. The next prime is 64344307. The reversal of 64344240 is 4244346.

64344240 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 (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 12735 + ... + 17054.

It is an arithmetic number, because the mean of its divisors is an integer number (2770470).

Almost surely, 2^64344240 is an apocalyptic number.

64344240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64344240 is an abundant number, since it is smaller than the sum of its proper divisors (157293360).

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

64344240 is a wasteful number, since it uses less digits than its factorization.

64344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29811 (or 29799 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64344240 is about 8021.4861465940. The cubic root of 64344240 is about 400.7158846752.

Adding to 64344240 its reverse (4244346), we get a palindrome (68588586).

The spelling of 64344240 in words is "sixty-four million, three hundred forty-four thousand, two hundred forty".