91814380 has 48 divisors (see below), whose sum is σ = 222659136. Its totient is φ = 31150080.

The previous prime is 91814369. The next prime is 91814381. The reversal of 91814380 is 8341819.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91814381) 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 15 ways as a sum of consecutive naturals, for example, 10200 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (4638732).

Almost surely, 2^91814380 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 91814380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111329568).

91814380 is an abundant number, since it is smaller than the sum of its proper divisors (130844756).

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

91814380 is a wasteful number, since it uses less digits than its factorization.

91814380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874 (or 6872 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 91814380 is about 9581.9820496597. The cubic root of 91814380 is about 451.1319322377.

The spelling of 91814380 in words is "ninety-one million, eight hundred fourteen thousand, three hundred eighty".