133540040 has 16 divisors (see below), whose sum is σ = 300465180. Its totient is φ = 53416000.

The previous prime is 133540039. The next prime is 133540061. The reversal of 133540040 is 40045331.

It can be written as a sum of positive squares in 2 ways, for example, as 122899396 + 10640644 = 11086^2 + 3262^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 133539994 and 133540021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669211 + ... + 1669290.

Almost surely, 2^133540040 is an apocalyptic number.

133540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133540040 is an abundant number, since it is smaller than the sum of its proper divisors (166925140).

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

133540040 is a wasteful number, since it uses less digits than its factorization.

133540040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338512 (or 3338508 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 133540040 is about 11555.9525786497. The cubic root of 133540040 is about 511.1368207329.

Adding to 133540040 its reverse (40045331), we get a palindrome (173585371).

The spelling of 133540040 in words is "one hundred thirty-three million, five hundred forty thousand, forty".