91428912 has 200 divisors, whose sum is σ = 288076800. Its totient is φ = 27900288.

The previous prime is 91428881. The next prime is 91428913. The reversal of 91428912 is 21982419.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (91428913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1157289 + ... + 1157367.

It is an arithmetic number, because the mean of its divisors is an integer number (1440384).

Almost surely, 2^91428912 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 91428912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144038400).

91428912 is an abundant number, since it is smaller than the sum of its proper divisors (196647888).

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

91428912 is a wasteful number, since it uses less digits than its factorization.

91428912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 150 counting only the distinct ones).

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

The square root of 91428912 is about 9561.8466835648. The cubic root of 91428912 is about 450.4997115465.

The spelling of 91428912 in words is "ninety-one million, four hundred twenty-eight thousand, nine hundred twelve".