133449806 has 16 divisors (see below), whose sum is σ = 240812160. Its totient is φ = 54182520.

The previous prime is 133449803. The next prime is 133449817. The reversal of 133449806 is 608944331.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 133449806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133449803) 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, 250580 + ... + 251111.

It is an arithmetic number, because the mean of its divisors is an integer number (15050760).

Almost surely, 2^133449806 is an apocalyptic number.

133449806 is a deficient number, since it is larger than the sum of its proper divisors (107362354).

133449806 is a wasteful number, since it uses less digits than its factorization.

133449806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501719.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 133449806 is about 11552.0476972700. The cubic root of 133449806 is about 511.0216684733.

The spelling of 133449806 in words is "one hundred thirty-three million, four hundred forty-nine thousand, eight hundred six".