133400844 has 60 divisors (see below), whose sum is σ = 350658000. Its totient is φ = 44222112.

The previous prime is 133400833. The next prime is 133400867. The reversal of 133400844 is 448004331.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63442 + ... + 65510.

It is an arithmetic number, because the mean of its divisors is an integer number (5844300).

Almost surely, 2^133400844 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 133400844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175329000).

133400844 is an abundant number, since it is smaller than the sum of its proper divisors (217257156).

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

133400844 is a wasteful number, since it uses less digits than its factorization.

133400844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 133400844 is about 11549.9283114658. The cubic root of 133400844 is about 510.9591638150.

The spelling of 133400844 in words is "one hundred thirty-three million, four hundred thousand, eight hundred forty-four".