75681444 has 12 divisors (see below), whose sum is σ = 176590064. Its totient is φ = 25227144.

The previous prime is 75681443. The next prime is 75681481. The reversal of 75681444 is 44418657.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (75681443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3153382 + ... + 3153405.

Almost surely, 2^75681444 is an apocalyptic number.

It is an amenable number.

75681444 is an abundant number, since it is smaller than the sum of its proper divisors (100908620).

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

75681444 is a wasteful number, since it uses less digits than its factorization.

75681444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306794 (or 6306792 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 75681444 is about 8699.5082619652. The cubic root of 75681444 is about 422.9897107524.

The spelling of 75681444 in words is "seventy-five million, six hundred eighty-one thousand, four hundred forty-four".