133288308 has 48 divisors (see below), whose sum is σ = 348237120. Its totient is φ = 44085600.

The previous prime is 133288307. The next prime is 133288327. The reversal of 133288308 is 803882331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133288301) 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, 9438 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (7254940).

Almost surely, 2^133288308 is an apocalyptic number.

133288308 is a gapful number since it is divisible by the number (18) 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 133288308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174118560).

133288308 is an abundant number, since it is smaller than the sum of its proper divisors (214948812).

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

133288308 is a wasteful number, since it uses less digits than its factorization.

133288308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9565 (or 9557 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 133288308 is about 11545.0555650460. The cubic root of 133288308 is about 510.8154428921.

The spelling of 133288308 in words is "one hundred thirty-three million, two hundred eighty-eight thousand, three hundred eight".