64385378 has 8 divisors (see below), whose sum is σ = 98161500. Its totient is φ = 31664880.

The previous prime is 64385371. The next prime is 64385381. The reversal of 64385378 is 87358346.

It can be written as a sum of positive squares in 2 ways, for example, as 56806369 + 7579009 = 7537^2 + 2753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64385371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263753 + ... + 263996.

Almost surely, 2^64385378 is an apocalyptic number.

64385378 is a deficient number, since it is larger than the sum of its proper divisors (33776122).

64385378 is a wasteful number, since it uses less digits than its factorization.

64385378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527812.

The product of its digits is 483840, while the sum is 44.

The square root of 64385378 is about 8024.0499749191. The cubic root of 64385378 is about 400.8012646988.

The spelling of 64385378 in words is "sixty-four million, three hundred eighty-five thousand, three hundred seventy-eight".