133943808 has 160 divisors (see below), whose sum is σ = 384975360. Its totient is φ = 41287680.

The previous prime is 133943807. The next prime is 133943809. The reversal of 133943808 is 808349331.

It is an interprime number because it is at equal distance from previous prime (133943807) and next prime (133943809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133943807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1380816 + ... + 1380912.

It is an arithmetic number, because the mean of its divisors is an integer number (2406096).

Almost surely, 2^133943808 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 133943808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192487680).

133943808 is an abundant number, since it is smaller than the sum of its proper divisors (251031552).

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

133943808 is an equidigital number, since it uses as much as digits as its factorization.

133943808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 133943808 is about 11573.4095235587. The cubic root of 133943808 is about 511.6514554902.

The spelling of 133943808 in words is "one hundred thirty-three million, nine hundred forty-three thousand, eight hundred eight".