91782448 has 20 divisors (see below), whose sum is σ = 183961440. Its totient is φ = 44308544.

The previous prime is 91782433. The next prime is 91782451. The reversal of 91782448 is 84428719.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98440 + ... + 99367.

It is an arithmetic number, because the mean of its divisors is an integer number (9198072).

Almost surely, 2^91782448 is an apocalyptic number.

It is an amenable number.

91782448 is an abundant number, since it is smaller than the sum of its proper divisors (92178992).

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

91782448 is a wasteful number, since it uses less digits than its factorization.

91782448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197844 (or 197838 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 91782448 is about 9580.3156524198. The cubic root of 91782448 is about 451.0796266504.

The spelling of 91782448 in words is "ninety-one million, seven hundred eighty-two thousand, four hundred forty-eight".