133885730 has 16 divisors (see below), whose sum is σ = 262903104. Its totient is φ = 48685680.

The previous prime is 133885711. The next prime is 133885733. The reversal of 133885730 is 37588331.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133885733) 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, 608462 + ... + 608681.

It is an arithmetic number, because the mean of its divisors is an integer number (16431444).

Almost surely, 2^133885730 is an apocalyptic number.

133885730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133885730 is a deficient number, since it is larger than the sum of its proper divisors (129017374).

133885730 is a wasteful number, since it uses less digits than its factorization.

133885730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217161.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 133885730 is about 11570.9001378458. The cubic root of 133885730 is about 511.5774941536.

The spelling of 133885730 in words is "one hundred thirty-three million, eight hundred eighty-five thousand, seven hundred thirty".