133638344 has 16 divisors (see below), whose sum is σ = 286368000. Its totient is φ = 57273552.

The previous prime is 133638341. The next prime is 133638371. The reversal of 133638344 is 443836331.

It is not an unprimeable number, because it can be changed into a prime (133638341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193144 + ... + 1193255.

It is an arithmetic number, because the mean of its divisors is an integer number (17898000).

Almost surely, 2^133638344 is an apocalyptic number.

133638344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133638344 is an abundant number, since it is smaller than the sum of its proper divisors (152729656).

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

133638344 is a wasteful number, since it uses less digits than its factorization.

133638344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386412 (or 2386408 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The square root of 133638344 is about 11560.2051884904. The cubic root of 133638344 is about 511.2622125119.

The spelling of 133638344 in words is "one hundred thirty-three million, six hundred thirty-eight thousand, three hundred forty-four".