133491340 has 24 divisors (see below), whose sum is σ = 295086960. Its totient is φ = 50586048.

The previous prime is 133491331. The next prime is 133491341. The reversal of 133491340 is 43194331.

It is a junction number, because it is equal to n+sod(n) for n = 133491299 and 133491308.

It is not an unprimeable number, because it can be changed into a prime (133491341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175267 + ... + 176026.

It is an arithmetic number, because the mean of its divisors is an integer number (12295290).

Almost surely, 2^133491340 is an apocalyptic number.

133491340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133491340 is an abundant number, since it is smaller than the sum of its proper divisors (161595620).

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

133491340 is a wasteful number, since it uses less digits than its factorization.

133491340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351321 (or 351319 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 133491340 is about 11553.8452473625. The cubic root of 133491340 is about 511.0746785975.

The spelling of 133491340 in words is "one hundred thirty-three million, four hundred ninety-one thousand, three hundred forty".