133407540 has 192 divisors, whose sum is σ = 491097600. Its totient is φ = 29417472.

The previous prime is 133407503. The next prime is 133407541. The reversal of 133407540 is 45704331.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133407541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109012 + ... + 110228.

It is an arithmetic number, because the mean of its divisors is an integer number (2557800).

Almost surely, 2^133407540 is an apocalyptic number.

133407540 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 133407540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245548800).

133407540 is an abundant number, since it is smaller than the sum of its proper divisors (357690060).

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

133407540 is a wasteful number, since it uses less digits than its factorization.

133407540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 133407540 is about 11550.2181797575. The cubic root of 133407540 is about 510.9677127997.

Subtracting from 133407540 its product of nonzero digits (5040), we obtain a square (133402500 = 11550²).

The spelling of 133407540 in words is "one hundred thirty-three million, four hundred seven thousand, five hundred forty".