63841378 has 4 divisors (see below), whose sum is σ = 95762070. Its totient is φ = 31920688.

The previous prime is 63841373. The next prime is 63841397. The reversal of 63841378 is 87314836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63632529 + 208849 = 7977^2 + 457^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 63841378.

It is not an unprimeable number, because it can be changed into a prime (63841373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15960343 + ... + 15960346.

Almost surely, 2^63841378 is an apocalyptic number.

63841378 is a deficient number, since it is larger than the sum of its proper divisors (31920692).

63841378 is a wasteful number, since it uses less digits than its factorization.

63841378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31920691.

The product of its digits is 96768, while the sum is 40.

The square root of 63841378 is about 7990.0799745685. The cubic root of 63841378 is about 399.6692641098.

The spelling of 63841378 in words is "sixty-three million, eight hundred forty-one thousand, three hundred seventy-eight".