133839744 has 64 divisors (see below), whose sum is σ = 364225680. Its totient is φ = 43520000.

The previous prime is 133839731. The next prime is 133839809. The reversal of 133839744 is 447938331.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 133839696 and 133839705.

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, 11494 + ... + 19994.

Almost surely, 2^133839744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133839744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182112840).

133839744 is an abundant number, since it is smaller than the sum of its proper divisors (230385936).

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

133839744 is an equidigital number, since it uses as much as digits as its factorization.

133839744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559 (or 8547 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 133839744 is about 11568.9128270551. The cubic root of 133839744 is about 511.5189165975.

The spelling of 133839744 in words is "one hundred thirty-three million, eight hundred thirty-nine thousand, seven hundred forty-four".