91144248 has 64 divisors (see below), whose sum is σ = 249463200. Its totient is φ = 27578880.

The previous prime is 91144243. The next prime is 91144253. The reversal of 91144248 is 84244119.

It is an interprime number because it is at equal distance from previous prime (91144243) and next prime (91144253).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91144243) 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, 16638 + ... + 21426.

Almost surely, 2^91144248 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 91144248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124731600).

91144248 is an abundant number, since it is smaller than the sum of its proper divisors (158318952).

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

91144248 is a wasteful number, since it uses less digits than its factorization.

91144248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4872 (or 4868 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 91144248 is about 9546.9496699208. The cubic root of 91144248 is about 450.0316817201.

The spelling of 91144248 in words is "ninety-one million, one hundred forty-four thousand, two hundred forty-eight".