64493944 has 8 divisors (see below), whose sum is σ = 120926160. Its totient is φ = 32246968.

The previous prime is 64493927. The next prime is 64493969. The reversal of 64493944 is 44939446.

64493944 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 (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64493944.

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 as a sum of consecutive naturals, namely, 4030864 + ... + 4030879.

It is an arithmetic number, because the mean of its divisors is an integer number (15115770).

Almost surely, 2^64493944 is an apocalyptic number.

It is an amenable number.

64493944 is a deficient number, since it is larger than the sum of its proper divisors (56432216).

64493944 is a wasteful number, since it uses less digits than its factorization.

64493944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061749 (or 8061745 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 64493944 is about 8030.8121631626. The cubic root of 64493944 is about 401.0264139333.

The spelling of 64493944 in words is "sixty-four million, four hundred ninety-three thousand, nine hundred forty-four".