18122748 has 120 divisors (see below), whose sum is σ = 53644752. Its totient is φ = 4741632.

The previous prime is 18122729. The next prime is 18122759. The reversal of 18122748 is 84722181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 489786 + ... + 489822.

Almost surely, 2^18122748 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 18122748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26822376).

18122748 is an abundant number, since it is smaller than the sum of its proper divisors (35522004).

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

18122748 is a wasteful number, since it uses less digits than its factorization.

18122748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 66 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 18122748 is about 4257.0820992788. The cubic root of 18122748 is about 262.6685140201.

It can be divided in two parts, 1812 and 2748, that added together give a triangular number (4560 = T₉₅).

The spelling of 18122748 in words is "eighteen million, one hundred twenty-two thousand, seven hundred forty-eight".