18269268 has 48 divisors (see below), whose sum is σ = 45709440. Its totient is φ = 5664384.

The previous prime is 18269267. The next prime is 18269269. The reversal of 18269268 is 86296281.

It is an interprime number because it is at equal distance from previous prime (18269267) and next prime (18269269).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18269267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9318 + ... + 11106.

It is an arithmetic number, because the mean of its divisors is an integer number (952280).

Almost surely, 2^18269268 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 18269268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22854720).

18269268 is an abundant number, since it is smaller than the sum of its proper divisors (27440172).

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

18269268 is a wasteful number, since it uses less digits than its factorization.

18269268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856 (or 1854 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 18269268 is about 4274.2564265612. The cubic root of 18269268 is about 263.3744948031.

The spelling of 18269268 in words is "eighteen million, two hundred sixty-nine thousand, two hundred sixty-eight".