18662028 has 96 divisors (see below), whose sum is σ = 57200640. Its totient is φ = 4587840.

The previous prime is 18662027. The next prime is 18662041. The reversal of 18662028 is 82026681.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 18662028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18662027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17025 + ... + 18087.

It is an arithmetic number, because the mean of its divisors is an integer number (595840).

Almost surely, 2^18662028 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 18662028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28600320).

18662028 is an abundant number, since it is smaller than the sum of its proper divisors (38538612).

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

18662028 is a wasteful number, since it uses less digits than its factorization.

18662028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18662028 is about 4319.9569442299. The cubic root of 18662028 is about 265.2485054679.

18662028 divided by its sum of digits (33) gives a triangular number (565516 = T₁₀₆₃).

The spelling of 18662028 in words is "eighteen million, six hundred sixty-two thousand, twenty-eight".