64719378 has 64 divisors (see below), whose sum is σ = 151787520. Its totient is φ = 20400336.

The previous prime is 64719367. The next prime is 64719379. The reversal of 64719378 is 87391746.

64719378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64719379) 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 31 ways as a sum of consecutive naturals, for example, 132651 + ... + 133137.

It is an arithmetic number, because the mean of its divisors is an integer number (2371680).

Almost surely, 2^64719378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64719378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75893760).

64719378 is an abundant number, since it is smaller than the sum of its proper divisors (87068142).

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

64719378 is a wasteful number, since it uses less digits than its factorization.

64719378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 622 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 64719378 is about 8044.8354861986. The cubic root of 64719378 is about 401.4931236858.

The spelling of 64719378 in words is "sixty-four million, seven hundred nineteen thousand, three hundred seventy-eight".