91002912 has 192 divisors, whose sum is σ = 321076224. Its totient is φ = 21795840.

The previous prime is 91002859. The next prime is 91002917. The reversal of 91002912 is 21920019.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91002917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95623 + ... + 96569.

It is an arithmetic number, because the mean of its divisors is an integer number (1672272).

Almost surely, 2^91002912 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 91002912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160538112).

91002912 is an abundant number, since it is smaller than the sum of its proper divisors (230073312).

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

91002912 is a wasteful number, since it uses less digits than its factorization.

91002912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 91002912 is about 9539.5446432207. The cubic root of 91002912 is about 449.7989422806.

The spelling of 91002912 in words is "ninety-one million, two thousand, nine hundred twelve".