133399560 has 160 divisors (see below), whose sum is σ = 467879040. Its totient is φ = 30425472.

The previous prime is 133399559. The next prime is 133399577. The reversal of 133399560 is 65993331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 287889 + ... + 288351.

It is an arithmetic number, because the mean of its divisors is an integer number (2924244).

Almost surely, 2^133399560 is an apocalyptic number.

133399560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133399560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233939520).

133399560 is an abundant number, since it is smaller than the sum of its proper divisors (334479480).

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

133399560 is an equidigital number, since it uses as much as digits as its factorization.

133399560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 39.

The square root of 133399560 is about 11549.8727265715. The cubic root of 133399560 is about 510.9575244609.

The spelling of 133399560 in words is "one hundred thirty-three million, three hundred ninety-nine thousand, five hundred sixty".