63381378 has 32 divisors (see below), whose sum is σ = 133943040. Its totient is φ = 19938960.

The previous prime is 63381377. The next prime is 63381403. The reversal of 63381378 is 87318336.

It is not an unprimeable number, because it can be changed into a prime (63381377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34093 + ... + 35903.

It is an arithmetic number, because the mean of its divisors is an integer number (4185720).

Almost surely, 2^63381378 is an apocalyptic number.

63381378 is an abundant number, since it is smaller than the sum of its proper divisors (70561662).

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

63381378 is a wasteful number, since it uses less digits than its factorization.

63381378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142.

The product of its digits is 72576, while the sum is 39.

The square root of 63381378 is about 7961.2422397513. The cubic root of 63381378 is about 398.7070292364.

The spelling of 63381378 in words is "sixty-three million, three hundred eighty-one thousand, three hundred seventy-eight".