133984378 has 32 divisors (see below), whose sum is σ = 234508608. Its totient is φ = 56736000.

The previous prime is 133984373. The next prime is 133984391. The reversal of 133984378 is 873489331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (133984373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36001 + ... + 39547.

It is an arithmetic number, because the mean of its divisors is an integer number (7328394).

Almost surely, 2^133984378 is an apocalyptic number.

133984378 is a deficient number, since it is larger than the sum of its proper divisors (100524230).

133984378 is a wasteful number, since it uses less digits than its factorization.

133984378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678.

The product of its digits is 435456, while the sum is 46.

The square root of 133984378 is about 11575.1621154954. The cubic root of 133984378 is about 511.7031080064.

The spelling of 133984378 in words is "one hundred thirty-three million, nine hundred eighty-four thousand, three hundred seventy-eight".