91444432 has 20 divisors (see below), whose sum is σ = 181496196. Its totient is φ = 44606720.

The previous prime is 91444417. The next prime is 91444439. The reversal of 91444432 is 23444419.

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 80712256 = 3276^2 + 8984^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91444394 and 91444403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91444439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69043 + ... + 70354.

Almost surely, 2^91444432 is an apocalyptic number.

It is an amenable number.

91444432 is a deficient number, since it is larger than the sum of its proper divisors (90051764).

91444432 is a wasteful number, since it uses less digits than its factorization.

91444432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139446 (or 139440 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 91444432 is about 9562.6582078416. The cubic root of 91444432 is about 450.5252007847.

It can be divided in two parts, 9 and 1444432, that added together give a palindrome (1444441).

The spelling of 91444432 in words is "ninety-one million, four hundred forty-four thousand, four hundred thirty-two".