133684290 has 64 divisors (see below), whose sum is σ = 358992000. Its totient is φ = 35399232.

The previous prime is 133684261. The next prime is 133684301. The reversal of 133684290 is 92486331.

133684290 is a `hidden beast` number, since 1 + 3 + 368 + 4 + 290 = 666.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 38569 + ... + 41891.

It is an arithmetic number, because the mean of its divisors is an integer number (5609250).

Almost surely, 2^133684290 is an apocalyptic number.

133684290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133684290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179496000).

133684290 is an abundant number, since it is smaller than the sum of its proper divisors (225307710).

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

133684290 is a wasteful number, since it uses less digits than its factorization.

133684290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 133684290 is about 11562.1922661751. The cubic root of 133684290 is about 511.3207978983.

The spelling of 133684290 in words is "one hundred thirty-three million, six hundred eighty-four thousand, two hundred ninety".