91782108 has 72 divisors (see below), whose sum is σ = 259315056. Its totient is φ = 27129600.

The previous prime is 91782091. The next prime is 91782109. The reversal of 91782108 is 80128719.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91782109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13410 + ... + 19062.

It is an arithmetic number, because the mean of its divisors is an integer number (3601598).

Almost surely, 2^91782108 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 91782108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129657528).

91782108 is an abundant number, since it is smaller than the sum of its proper divisors (167532948).

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

91782108 is a wasteful number, since it uses less digits than its factorization.

91782108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5715 (or 5710 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 91782108 is about 9580.2979076853. The cubic root of 91782108 is about 451.0790696547.

The spelling of 91782108 in words is "ninety-one million, seven hundred eighty-two thousand, one hundred eight".