133106640 has 40 divisors (see below), whose sum is σ = 412631328. Its totient is φ = 35495040.

The previous prime is 133106627. The next prime is 133106683. The reversal of 133106640 is 46601331.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×133106640² = 35434755224179200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 133106640.

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, 277066 + ... + 277545.

Almost surely, 2^133106640 is an apocalyptic number.

133106640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133106640 is an abundant number, since it is smaller than the sum of its proper divisors (279524688).

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

133106640 is a wasteful number, since it uses less digits than its factorization.

133106640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554627 (or 554621 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 133106640 is about 11537.1850986278. The cubic root of 133106640 is about 510.5832619556.

Adding to 133106640 its reverse (46601331), we get a palindrome (179707971).

The spelling of 133106640 in words is "one hundred thirty-three million, one hundred six thousand, six hundred forty".