133188680 has 16 divisors (see below), whose sum is σ = 299674620. Its totient is φ = 53275456.

The previous prime is 133188667. The next prime is 133188691. The reversal of 133188680 is 86881331.

It can be written as a sum of positive squares in 2 ways, for example, as 121396324 + 11792356 = 11018^2 + 3434^2 .

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, 1664819 + ... + 1664898.

Almost surely, 2^133188680 is an apocalyptic number.

133188680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133188680 is an abundant number, since it is smaller than the sum of its proper divisors (166485940).

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

133188680 is a wasteful number, since it uses less digits than its factorization.

133188680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329728 (or 3329724 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 133188680 is about 11540.7400109352. The cubic root of 133188680 is about 510.6881393879.

The spelling of 133188680 in words is "one hundred thirty-three million, one hundred eighty-eight thousand, six hundred eighty".