133656684 has 48 divisors (see below), whose sum is σ = 358154496. Its totient is φ = 38001600.

The previous prime is 133656683. The next prime is 133656689. The reversal of 133656684 is 486656331.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (133656683) 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 15 ways as a sum of consecutive naturals, for example, 13954 + ... + 21494.

It is an arithmetic number, because the mean of its divisors is an integer number (7461552).

Almost surely, 2^133656684 is an apocalyptic number.

133656684 is a gapful number since it is divisible by the number (14) 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 133656684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179077248).

133656684 is an abundant number, since it is smaller than the sum of its proper divisors (224497812).

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

133656684 is a wasteful number, since it uses less digits than its factorization.

133656684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7766 (or 7764 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 133656684 is about 11560.9983997923. The cubic root of 133656684 is about 511.2855993129.

The spelling of 133656684 in words is "one hundred thirty-three million, six hundred fifty-six thousand, six hundred eighty-four".