133671744 has 84 divisors (see below), whose sum is σ = 385145280. Its totient is φ = 44325120.

The previous prime is 133671739. The next prime is 133671751. The reversal of 133671744 is 447176331.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 133671699 and 133671708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137179 + ... + 138149.

Almost surely, 2^133671744 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 133671744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192572640).

133671744 is an abundant number, since it is smaller than the sum of its proper divisors (251473536).

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

133671744 is a wasteful number, since it uses less digits than its factorization.

133671744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1215 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 133671744 is about 11561.6497092759. The cubic root of 133671744 is about 511.3048019239.

The spelling of 133671744 in words is "one hundred thirty-three million, six hundred seventy-one thousand, seven hundred forty-four".