91052208 has 160 divisors (see below), whose sum is σ = 291092480. Its totient is φ = 27060480.

The previous prime is 91052201. The next prime is 91052249. The reversal of 91052208 is 80225019.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91052201) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 173835 + ... + 174357.

It is an arithmetic number, because the mean of its divisors is an integer number (1819328).

Almost surely, 2^91052208 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 91052208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145546240).

91052208 is an abundant number, since it is smaller than the sum of its proper divisors (200040272).

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

91052208 is a wasteful number, since it uses less digits than its factorization.

91052208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 91052208 is about 9542.1280645357. The cubic root of 91052208 is about 449.8801458584.

The spelling of 91052208 in words is "ninety-one million, fifty-two thousand, two hundred eight".