133861904 has 20 divisors (see below), whose sum is σ = 282935760. Its totient is φ = 60846240.

The previous prime is 133861901. The next prime is 133861921. The reversal of 133861904 is 409168331.

It is not an unprimeable number, because it can be changed into a prime (133861901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380114 + ... + 380465.

It is an arithmetic number, because the mean of its divisors is an integer number (14146788).

Almost surely, 2^133861904 is an apocalyptic number.

It is an amenable number.

133861904 is an abundant number, since it is smaller than the sum of its proper divisors (149073856).

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

133861904 is a wasteful number, since it uses less digits than its factorization.

133861904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760598 (or 760592 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 133861904 is about 11569.8705265012. The cubic root of 133861904 is about 511.5471459642.

The spelling of 133861904 in words is "one hundred thirty-three million, eight hundred sixty-one thousand, nine hundred four".