133870770 has 144 divisors (see below), whose sum is σ = 403341120. Its totient is φ = 30697920.

The previous prime is 133870721. The next prime is 133870771. The reversal of 133870770 is 77078331.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133870771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 206587 + ... + 207233.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^133870770 is an apocalyptic number.

133870770 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 133870770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201670560).

133870770 is an abundant number, since it is smaller than the sum of its proper divisors (269470350).

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

133870770 is a wasteful number, since it uses less digits than its factorization.

133870770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 133870770 is about 11570.2536705122. The cubic root of 133870770 is about 511.5584393861.

It can be divided in two parts, 13 and 3870770, that added together give a palindrome (3870783).

The spelling of 133870770 in words is "one hundred thirty-three million, eight hundred seventy thousand, seven hundred seventy".