64889442 has 24 divisors (see below), whose sum is σ = 148864716. Its totient is φ = 20357376.

The previous prime is 64889441. The next prime is 64889471. The reversal of 64889442 is 24498846.

64889442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64786401 + 103041 = 8049^2 + 321^2 .

It is not an unprimeable number, because it can be changed into a prime (64889441) 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 11 ways as a sum of consecutive naturals, for example, 105723 + ... + 106334.

Almost surely, 2^64889442 is an apocalyptic number.

64889442 is an abundant number, since it is smaller than the sum of its proper divisors (83975274).

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

64889442 is a wasteful number, since it uses less digits than its factorization.

64889442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212082 (or 212079 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 64889442 is about 8055.3983141742. The cubic root of 64889442 is about 401.8444857740.

The spelling of 64889442 in words is "sixty-four million, eight hundred eighty-nine thousand, four hundred forty-two".