133889220 has 48 divisors (see below), whose sum is σ = 416545920. Its totient is φ = 35703648.

The previous prime is 133889191. The next prime is 133889243. The reversal of 133889220 is 22988331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123432 + ... + 124511.

It is an arithmetic number, because the mean of its divisors is an integer number (8678040).

Almost surely, 2^133889220 is an apocalyptic number.

133889220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133889220 is an abundant number, since it is smaller than the sum of its proper divisors (282656700).

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

133889220 is a wasteful number, since it uses less digits than its factorization.

133889220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247961 (or 247953 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 133889220 is about 11571.0509462192. The cubic root of 133889220 is about 511.5819392127.

The spelling of 133889220 in words is "one hundred thirty-three million, eight hundred eighty-nine thousand, two hundred twenty".