18791088 has 40 divisors (see below), whose sum is σ = 49276608. Its totient is φ = 6169152.

The previous prime is 18791077. The next prime is 18791089. The reversal of 18791088 is 88019781.

It is not an unprimeable number, because it can be changed into a prime (18791089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295 + ... + 6137.

Almost surely, 2^18791088 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 18791088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24638304).

18791088 is an abundant number, since it is smaller than the sum of its proper divisors (30485520).

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

18791088 is a wasteful number, since it uses less digits than its factorization.

18791088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921 (or 5915 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 18791088 is about 4334.8688561478. The cubic root of 18791088 is about 265.8585563429.

The spelling of 18791088 in words is "eighteen million, seven hundred ninety-one thousand, eighty-eight".