133888172 has 12 divisors (see below), whose sum is σ = 255604776. Its totient is φ = 60858240.

The previous prime is 133888159. The next prime is 133888189. The reversal of 133888172 is 271888331.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521413 + ... + 1521500.

It is an arithmetic number, because the mean of its divisors is an integer number (21300398).

Almost surely, 2^133888172 is an apocalyptic number.

It is an amenable number.

133888172 is a deficient number, since it is larger than the sum of its proper divisors (121716604).

133888172 is a wasteful number, since it uses less digits than its factorization.

133888172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042928 (or 3042926 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 133888172 is about 11571.0056607021. The cubic root of 133888172 is about 511.5806044295.

The spelling of 133888172 in words is "one hundred thirty-three million, eight hundred eighty-eight thousand, one hundred seventy-two".