133685610 has 64 divisors (see below), whose sum is σ = 331164288. Its totient is φ = 34521344.

The previous prime is 133685549. The next prime is 133685627. The reversal of 133685610 is 16586331.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131464 + ... + 132476.

It is an arithmetic number, because the mean of its divisors is an integer number (5174442).

Almost surely, 2^133685610 is an apocalyptic number.

133685610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133685610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165582144).

133685610 is an abundant number, since it is smaller than the sum of its proper divisors (197478678).

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

133685610 is a wasteful number, since it uses less digits than its factorization.

133685610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 133685610 is about 11562.2493486345. The cubic root of 133685610 is about 511.3224808216.

The spelling of 133685610 in words is "one hundred thirty-three million, six hundred eighty-five thousand, six hundred ten".