91229380 has 24 divisors (see below), whose sum is σ = 208998720. Its totient is φ = 33174240.

The previous prime is 91229357. The next prime is 91229401. The reversal of 91229380 is 8392219.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207120 + ... + 207559.

It is an arithmetic number, because the mean of its divisors is an integer number (8708280).

Almost surely, 2^91229380 is an apocalyptic number.

It is an amenable number.

91229380 is an abundant number, since it is smaller than the sum of its proper divisors (117769340).

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

91229380 is a wasteful number, since it uses less digits than its factorization.

91229380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414699 (or 414697 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 91229380 is about 9551.4072261631. The cubic root of 91229380 is about 450.1717533679.

The spelling of 91229380 in words is "ninety-one million, two hundred twenty-nine thousand, three hundred eighty".