91190448 has 100 divisors (see below), whose sum is σ = 279524520. Its totient is φ = 28601856.

The previous prime is 91190447. The next prime is 91190479. The reversal of 91190448 is 84409119.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91190447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19963 + ... + 24101.

Almost surely, 2^91190448 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 91190448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139762260).

91190448 is an abundant number, since it is smaller than the sum of its proper divisors (188334072).

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

91190448 is a wasteful number, since it uses less digits than its factorization.

91190448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 4161 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 91190448 is about 9549.3689843884. The cubic root of 91190448 is about 450.1077075515.

The spelling of 91190448 in words is "ninety-one million, one hundred ninety thousand, four hundred forty-eight".