133838778 has 8 divisors (see below), whose sum is σ = 267677568. Its totient is φ = 44612924.

The previous prime is 133838767. The next prime is 133838839. The reversal of 133838778 is 877838331.

133838778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

133838778 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11153226 + ... + 11153237.

It is an arithmetic number, because the mean of its divisors is an integer number (33459696).

Almost surely, 2^133838778 is an apocalyptic number.

133838778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

133838778 is a wasteful number, since it uses less digits than its factorization.

133838778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22306468.

The product of its digits is 677376, while the sum is 48.

The square root of 133838778 is about 11568.8710771622. The cubic root of 133838778 is about 511.5176859504.

The spelling of 133838778 in words is "one hundred thirty-three million, eight hundred thirty-eight thousand, seven hundred seventy-eight".