133889320 has 32 divisors (see below), whose sum is σ = 302931720. Its totient is φ = 53256960.

The previous prime is 133889299. The next prime is 133889339. The reversal of 133889320 is 23988331.

It can be written as a sum of positive squares in 4 ways, for example, as 58094884 + 75794436 = 7622^2 + 8706^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133889320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007 + ... + 16486.

Almost surely, 2^133889320 is an apocalyptic number.

133889320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133889320 is an abundant number, since it is smaller than the sum of its proper divisors (169042400).

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

133889320 is a wasteful number, since it uses less digits than its factorization.

133889320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685 (or 18681 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 133889320 is about 11571.0552673471. The cubic root of 133889320 is about 511.5820665772.

The spelling of 133889320 in words is "one hundred thirty-three million, eight hundred eighty-nine thousand, three hundred twenty".