91020200 has 96 divisors (see below), whose sum is σ = 226056960. Its totient is φ = 34003200.

The previous prime is 91020199. The next prime is 91020217. The reversal of 91020200 is 202019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215990 + ... + 216410.

It is an arithmetic number, because the mean of its divisors is an integer number (2354760).

Almost surely, 2^91020200 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 91020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113028480).

91020200 is an abundant number, since it is smaller than the sum of its proper divisors (135036760).

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

91020200 is a wasteful number, since it uses less digits than its factorization.

91020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 91020200 is about 9540.4507231053. The cubic root of 91020200 is about 449.8274235368.

Adding to 91020200 its reverse (202019), we get a palindrome (91222219).

The spelling of 91020200 in words is "ninety-one million, twenty thousand, two hundred".