133591380 has 48 divisors (see below), whose sum is σ = 402831744. Its totient is φ = 32883840.

The previous prime is 133591379. The next prime is 133591391. The reversal of 133591380 is 83195331.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 84856 + ... + 86415.

It is an arithmetic number, because the mean of its divisors is an integer number (8392328).

Almost surely, 2^133591380 is an apocalyptic number.

133591380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133591380 is an abundant number, since it is smaller than the sum of its proper divisors (269240364).

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

133591380 is a wasteful number, since it uses less digits than its factorization.

133591380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171296 (or 171294 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 133591380 is about 11558.1737311740. The cubic root of 133591380 is about 511.2023152023.

The spelling of 133591380 in words is "one hundred thirty-three million, five hundred ninety-one thousand, three hundred eighty".