18422488 has 32 divisors (see below), whose sum is σ = 40131360. Its totient is φ = 7764480.

The previous prime is 18422483. The next prime is 18422491. The reversal of 18422488 is 88422481.

It is a super-2 number, since 2×18422488² = 678776128220288, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18422483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720 + ... + 6112.

It is an arithmetic number, because the mean of its divisors is an integer number (1254105).

Almost surely, 2^18422488 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 18422488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20065680).

18422488 is an abundant number, since it is smaller than the sum of its proper divisors (21708872).

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

18422488 is a wasteful number, since it uses less digits than its factorization.

18422488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467 (or 5463 counting only the distinct ones).

The product of its digits is 32768, while the sum is 37.

The square root of 18422488 is about 4292.1425884982. The cubic root of 18422488 is about 264.1087323764.

The spelling of 18422488 in words is "eighteen million, four hundred twenty-two thousand, four hundred eighty-eight".