91330416 has 100 divisors (see below), whose sum is σ = 278324200. Its totient is φ = 28833408.

The previous prime is 91330391. The next prime is 91330417. The reversal of 91330416 is 61403319.

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

It is a self number, because there is not a number n which added to its sum of digits gives 91330416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91330417) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22770 + ... + 26478.

It is an arithmetic number, because the mean of its divisors is an integer number (2783242).

Almost surely, 2^91330416 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 91330416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139162100).

91330416 is an abundant number, since it is smaller than the sum of its proper divisors (186993784).

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

91330416 is a wasteful number, since it uses less digits than its factorization.

91330416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 91330416 is about 9556.6948261415. The cubic root of 91330416 is about 450.3378795752.

It can be divided in two parts, 913 and 30416, that added together give a square (31329 = 177²).

The spelling of 91330416 in words is "ninety-one million, three hundred thirty thousand, four hundred sixteen".