18490128 has 40 divisors (see below), whose sum is σ = 48583200. Its totient is φ = 6057984.

The previous prime is 18490127. The next prime is 18490151. The reversal of 18490128 is 82109481.

It is not an unprimeable number, because it can be changed into a prime (18490123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433 + ... + 6096.

It is an arithmetic number, because the mean of its divisors is an integer number (1214580).

Almost surely, 2^18490128 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 18490128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24291600).

18490128 is an abundant number, since it is smaller than the sum of its proper divisors (30093072).

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

18490128 is a wasteful number, since it uses less digits than its factorization.

18490128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599 (or 6593 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18490128 is about 4300.0148836952. The cubic root of 18490128 is about 264.4315714270.

The spelling of 18490128 in words is "eighteen million, four hundred ninety thousand, one hundred twenty-eight".