133509740 has 96 divisors (see below), whose sum is σ = 348754560. Its totient is φ = 41803776.

The previous prime is 133509737. The next prime is 133509767. The reversal of 133509740 is 47905331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133509697 and 133509706.

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, 198044 + ... + 198716.

It is an arithmetic number, because the mean of its divisors is an integer number (3632860).

Almost surely, 2^133509740 is an apocalyptic number.

133509740 is a gapful number since it is divisible by the number (10) 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 133509740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174377280).

133509740 is an abundant number, since it is smaller than the sum of its proper divisors (215244820).

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

133509740 is a wasteful number, since it uses less digits than its factorization.

133509740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 133509740 is about 11554.6414916258. The cubic root of 133509740 is about 511.0981591271.

The spelling of 133509740 in words is "one hundred thirty-three million, five hundred nine thousand, seven hundred forty".