133502040 has 128 divisors (see below), whose sum is σ = 508608000. Its totient is φ = 30513024.

The previous prime is 133502011. The next prime is 133502041. The reversal of 133502040 is 40205331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133502041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1270 + ... + 16389.

It is an arithmetic number, because the mean of its divisors is an integer number (3973500).

Almost surely, 2^133502040 is an apocalyptic number.

133502040 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 133502040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254304000).

133502040 is an abundant number, since it is smaller than the sum of its proper divisors (375105960).

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

133502040 is a wasteful number, since it uses less digits than its factorization.

133502040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17686 (or 17676 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 133502040 is about 11554.3082873879. The cubic root of 133502040 is about 511.0883332984.

Adding to 133502040 its reverse (40205331), we get a palindrome (173707371).

It can be divided in two parts, 13 and 3502040, that added together give a palindrome (3502053).

The spelling of 133502040 in words is "one hundred thirty-three million, five hundred two thousand, forty".