133397760 has 72 divisors (see below), whose sum is σ = 426051360. Its totient is φ = 35571712.

The previous prime is 133397749. The next prime is 133397773. The reversal of 133397760 is 67793331.

It is a congruent number.

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, 13530 + ... + 21209.

It is an arithmetic number, because the mean of its divisors is an integer number (5917380).

Almost surely, 2^133397760 is an apocalyptic number.

133397760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133397760 is an abundant number, since it is smaller than the sum of its proper divisors (292653600).

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

133397760 is an equidigital number, since it uses as much as digits as its factorization.

133397760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34763 (or 34749 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 39.

The square root of 133397760 is about 11549.7948033720. The cubic root of 133397760 is about 510.9552262832.

The spelling of 133397760 in words is "one hundred thirty-three million, three hundred ninety-seven thousand, seven hundred sixty".