133890248 has 12 divisors (see below), whose sum is σ = 251105595. Its totient is φ = 66928760.

The previous prime is 133890247. The next prime is 133890257. The reversal of 133890248 is 842098331.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 66945124 + 66945124 = 8182^2 + 8182^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8182.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133890241) 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 2 ways as a sum of consecutive naturals, for example, 30683 + ... + 34773.

Almost surely, 2^133890248 is an apocalyptic number.

It is an amenable number.

133890248 is a deficient number, since it is larger than the sum of its proper divisors (117215347).

133890248 is an frugal number, since it uses more digits than its factorization.

133890248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8188 (or 4093 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 133890248 is about 11571.0953673367. The cubic root of 133890248 is about 511.5832485163.

Multiplying 133890248 by its product of nonzero digits (41472), we get a square (5552696365056 = 2356416²).

The spelling of 133890248 in words is "one hundred thirty-three million, eight hundred ninety thousand, two hundred forty-eight".