133640460 has 72 divisors (see below), whose sum is σ = 411124896. Its totient is φ = 35132160.

The previous prime is 133640459. The next prime is 133640483. The reversal of 133640460 is 64046331.

133640460 is a `hidden beast` number, since 13 + 3 + 640 + 4 + 6 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7552 + ... + 18008.

It is an arithmetic number, because the mean of its divisors is an integer number (5710068).

Almost surely, 2^133640460 is an apocalyptic number.

133640460 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 133640460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205562448).

133640460 is an abundant number, since it is smaller than the sum of its proper divisors (277484436).

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

133640460 is a wasteful number, since it uses less digits than its factorization.

133640460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543 (or 10538 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 133640460 is about 11560.2967089950. The cubic root of 133640460 is about 511.2649109019.

Adding to 133640460 its reverse (64046331), we get a palindrome (197686791).

The spelling of 133640460 in words is "one hundred thirty-three million, six hundred forty thousand, four hundred sixty".