133866372 has 24 divisors (see below), whose sum is σ = 312632992. Its totient is φ = 44582400.

The previous prime is 133866331. The next prime is 133866377. The reversal of 133866372 is 273668331.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 133866372.

It is not an unprimeable number, because it can be changed into a prime (133866377) 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, 11172 + ... + 19812.

Almost surely, 2^133866372 is an apocalyptic number.

133866372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133866372 is an abundant number, since it is smaller than the sum of its proper divisors (178766620).

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

133866372 is a wasteful number, since it uses less digits than its factorization.

133866372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9939 (or 9937 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 133866372 is about 11570.0636126168. The cubic root of 133866372 is about 511.5528373201.

The spelling of 133866372 in words is "one hundred thirty-three million, eight hundred sixty-six thousand, three hundred seventy-two".