18369428 has 96 divisors (see below), whose sum is σ = 43760640. Its totient is φ = 6531840.

The previous prime is 18369419. The next prime is 18369431. The reversal of 18369428 is 82496381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251600 + ... + 251672.

It is an arithmetic number, because the mean of its divisors is an integer number (455840).

Almost surely, 2^18369428 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 18369428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21880320).

18369428 is an abundant number, since it is smaller than the sum of its proper divisors (25391212).

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

18369428 is a wasteful number, since it uses less digits than its factorization.

18369428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 155 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 18369428 is about 4285.9570693137. The cubic root of 18369428 is about 263.8549287136.

The spelling of 18369428 in words is "eighteen million, three hundred sixty-nine thousand, four hundred twenty-eight".