64424140 has 24 divisors (see below), whose sum is σ = 147590352. Its totient is φ = 23426880.

The previous prime is 64424111. The next prime is 64424147. The reversal of 64424140 is 4142446.

64424140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64424147) 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 7 ways as a sum of consecutive naturals, for example, 146199 + ... + 146638.

It is an arithmetic number, because the mean of its divisors is an integer number (6149598).

Almost surely, 2^64424140 is an apocalyptic number.

It is an amenable number.

64424140 is an abundant number, since it is smaller than the sum of its proper divisors (83166212).

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

64424140 is a wasteful number, since it uses less digits than its factorization.

64424140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292857 (or 292855 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 64424140 is about 8026.4649753176. The cubic root of 64424140 is about 400.8816801723.

Adding to 64424140 its reverse (4142446), we get a palindrome (68566586).

The spelling of 64424140 in words is "sixty-four million, four hundred twenty-four thousand, one hundred forty".