91128246 has 32 divisors (see below), whose sum is σ = 200486016. Its totient is φ = 27612200.

The previous prime is 91128239. The next prime is 91128259. The reversal of 91128246 is 64282119.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2281 + ... + 13691.

It is an arithmetic number, because the mean of its divisors is an integer number (6265188).

Almost surely, 2^91128246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91128246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100243008).

91128246 is an abundant number, since it is smaller than the sum of its proper divisors (109357770).

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

91128246 is a wasteful number, since it uses less digits than its factorization.

91128246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11449 (or 11427 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 91128246 is about 9546.1115644015. Note that the first 3 decimals coincide. The cubic root of 91128246 is about 450.0053431464.

The spelling of 91128246 in words is "ninety-one million, one hundred twenty-eight thousand, two hundred forty-six".