91448244 has 48 divisors (see below), whose sum is σ = 238271040. Its totient is φ = 30330720.

The previous prime is 91448243. The next prime is 91448249. The reversal of 91448244 is 44284419.

It is a super-4 number, since 4×91448244⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 91448199 and 91448208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91448243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20782 + ... + 24794.

It is an arithmetic number, because the mean of its divisors is an integer number (4963980).

Almost surely, 2^91448244 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 91448244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119135520).

91448244 is an abundant number, since it is smaller than the sum of its proper divisors (146822796).

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

91448244 is a wasteful number, since it uses less digits than its factorization.

91448244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237 (or 4229 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 91448244 is about 9562.8575227282. The cubic root of 91448244 is about 450.5314609734.

The spelling of 91448244 in words is "ninety-one million, four hundred forty-eight thousand, two hundred forty-four".