133306890 has 16 divisors (see below), whose sum is σ = 319936608. Its totient is φ = 35548496.

The previous prime is 133306883. The next prime is 133306897. The reversal of 133306890 is 98603331.

It is an interprime number because it is at equal distance from previous prime (133306883) and next prime (133306897).

It is not an unprimeable number, because it can be changed into a prime (133306897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2221752 + ... + 2221811.

It is an arithmetic number, because the mean of its divisors is an integer number (19996038).

Almost surely, 2^133306890 is an apocalyptic number.

133306890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133306890 is an abundant number, since it is smaller than the sum of its proper divisors (186629718).

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

133306890 is a wasteful number, since it uses less digits than its factorization.

133306890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443573.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 133306890 is about 11545.8602970935. The cubic root of 133306890 is about 510.8391797365.

The spelling of 133306890 in words is "one hundred thirty-three million, three hundred six thousand, eight hundred ninety".