91390416 has 80 divisors (see below), whose sum is σ = 256066944. Its totient is φ = 27919872.

The previous prime is 91390373. The next prime is 91390417. The reversal of 91390416 is 61409319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91390417) 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 15 ways as a sum of consecutive naturals, for example, 103770 + ... + 104646.

Almost surely, 2^91390416 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 91390416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128033472).

91390416 is an abundant number, since it is smaller than the sum of its proper divisors (164676528).

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

91390416 is a wasteful number, since it uses less digits than its factorization.

91390416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 91390416 is about 9559.8334713529. The cubic root of 91390416 is about 450.4364752715.

It can be divided in two parts, 91390 and 416, that added together give a triangular number (91806 = T₄₂₈).

The spelling of 91390416 in words is "ninety-one million, three hundred ninety thousand, four hundred sixteen".