133085890 has 32 divisors (see below), whose sum is σ = 274855680. Its totient is φ = 45449664.

The previous prime is 133085857. The next prime is 133085891. The reversal of 133085890 is 98580331.

It is not an unprimeable number, because it can be changed into a prime (133085891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14796 + ... + 22024.

It is an arithmetic number, because the mean of its divisors is an integer number (8589240).

Almost surely, 2^133085890 is an apocalyptic number.

133085890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133085890 is an abundant number, since it is smaller than the sum of its proper divisors (141769790).

133085890 is a wasteful number, since it uses less digits than its factorization.

133085890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7506.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 133085890 is about 11536.2857974306. The cubic root of 133085890 is about 510.5567289611.

The spelling of 133085890 in words is "one hundred thirty-three million, eighty-five thousand, eight hundred ninety".