133895890 has 32 divisors (see below), whose sum is σ = 244984320. Its totient is φ = 52683264.

The previous prime is 133895837. The next prime is 133895891. The reversal of 133895890 is 98598331.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 133895890.

It is not an unprimeable number, because it can be changed into a prime (133895891) 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, 216001 + ... + 216619.

It is an arithmetic number, because the mean of its divisors is an integer number (7655760).

Almost surely, 2^133895890 is an apocalyptic number.

133895890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133895890 is a deficient number, since it is larger than the sum of its proper divisors (111088430).

133895890 is a wasteful number, since it uses less digits than its factorization.

133895890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 133895890 is about 11571.3391619121. The cubic root of 133895890 is about 511.5904342827.

The spelling of 133895890 in words is "one hundred thirty-three million, eight hundred ninety-five thousand, eight hundred ninety".