64244642 has 16 divisors (see below), whose sum is σ = 120146112. Its totient is φ = 25030320.

The previous prime is 64244633. The next prime is 64244671. The reversal of 64244642 is 24644246.

64244642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64244599 and 64244608.

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 7 ways as a sum of consecutive naturals, for example, 208433 + ... + 208740.

It is an arithmetic number, because the mean of its divisors is an integer number (7509132).

Almost surely, 2^64244642 is an apocalyptic number.

64244642 is a deficient number, since it is larger than the sum of its proper divisors (55901470).

64244642 is a wasteful number, since it uses less digits than its factorization.

64244642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417193.

The product of its digits is 36864, while the sum is 32.

The square root of 64244642 is about 8015.2755411152. The cubic root of 64244642 is about 400.5090227980.

Adding to 64244642 its reverse (24644246), we get a palindrome (88888888).

The spelling of 64244642 in words is "sixty-four million, two hundred forty-four thousand, six hundred forty-two".