133699284 has 72 divisors (see below), whose sum is σ = 349090560. Its totient is φ = 43123392.

The previous prime is 133699273. The next prime is 133699289. The reversal of 133699284 is 482996331.

It is a happy number.

133699284 is a `hidden beast` number, since 1 + 3 + 369 + 9 + 284 = 666.

133699284 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×133699284² = 35750997084225312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133699289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150289 + ... + 151175.

It is an arithmetic number, because the mean of its divisors is an integer number (4848480).

Almost surely, 2^133699284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133699284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174545280).

133699284 is an abundant number, since it is smaller than the sum of its proper divisors (215391276).

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

133699284 is a wasteful number, since it uses less digits than its factorization.

133699284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1024 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 133699284 is about 11562.8406544413. The cubic root of 133699284 is about 511.3399137256.

The spelling of 133699284 in words is "one hundred thirty-three million, six hundred ninety-nine thousand, two hundred eighty-four".