18229128 has 16 divisors (see below), whose sum is σ = 45572880. Its totient is φ = 6076368.

The previous prime is 18229121. The next prime is 18229129. The reversal of 18229128 is 82192281.

It is a super-2 number, since 2×18229128² = 664602215280768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18229121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379750 + ... + 379797.

It is an arithmetic number, because the mean of its divisors is an integer number (2848305).

Almost surely, 2^18229128 is an apocalyptic number.

It is an amenable number.

18229128 is an abundant number, since it is smaller than the sum of its proper divisors (27343752).

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

18229128 is a wasteful number, since it uses less digits than its factorization.

18229128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759556 (or 759552 counting only the distinct ones).

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

The square root of 18229128 is about 4269.5582909711. The cubic root of 18229128 is about 263.1814638203.

The spelling of 18229128 in words is "eighteen million, two hundred twenty-nine thousand, one hundred twenty-eight".