133669284 has 96 divisors (see below), whose sum is σ = 380835840. Its totient is φ = 35659008.

The previous prime is 133669273. The next prime is 133669379. The reversal of 133669284 is 482966331.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82272 + ... + 83880.

It is an arithmetic number, because the mean of its divisors is an integer number (3967040).

Almost surely, 2^133669284 is an apocalyptic number.

133669284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133669284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190417920).

133669284 is an abundant number, since it is smaller than the sum of its proper divisors (247166556).

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

133669284 is a wasteful number, since it uses less digits than its factorization.

133669284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 133669284 is about 11561.5433225846. The cubic root of 133669284 is about 511.3016653410.

The spelling of 133669284 in words is "one hundred thirty-three million, six hundred sixty-nine thousand, two hundred eighty-four".