91444064 has 24 divisors (see below), whose sum is σ = 181456128. Its totient is φ = 45360000.

The previous prime is 91444061. The next prime is 91444081. The reversal of 91444064 is 46044419.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 91444064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91444061) 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, 7187 + ... + 15314.

It is an arithmetic number, because the mean of its divisors is an integer number (7560672).

Almost surely, 2^91444064 is an apocalyptic number.

It is an amenable number.

91444064 is a deficient number, since it is larger than the sum of its proper divisors (90012064).

91444064 is a wasteful number, since it uses less digits than its factorization.

91444064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22638 (or 22630 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 91444064 is about 9562.6389663105. The cubic root of 91444064 is about 450.5245964341.

It can be divided in two parts, 9144 and 4064, that multiplied together give a square (37161216 = 6096²).

The spelling of 91444064 in words is "ninety-one million, four hundred forty-four thousand, sixty-four".