91442064 has 80 divisors (see below), whose sum is σ = 278712320. Its totient is φ = 25280640.

The previous prime is 91442053. The next prime is 91442083. The reversal of 91442064 is 46024419.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6027 + ... + 14805.

It is an arithmetic number, because the mean of its divisors is an integer number (3483904).

Almost surely, 2^91442064 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 91442064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139356160).

91442064 is an abundant number, since it is smaller than the sum of its proper divisors (187270256).

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

91442064 is a wasteful number, since it uses less digits than its factorization.

91442064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8828 (or 8822 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 91442064 is about 9562.5343920950. The cubic root of 91442064 is about 450.5213118915.

The spelling of 91442064 in words is "ninety-one million, four hundred forty-two thousand, sixty-four".