18484272 has 60 divisors (see below), whose sum is σ = 53989104. Its totient is φ = 5892480.

The previous prime is 18484259. The next prime is 18484273. The reversal of 18484272 is 27248481.

It is a super-2 number, since 2×18484272² = 683336622739968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18484273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522 + ... + 6102.

Almost surely, 2^18484272 is an apocalyptic number.

18484272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18484272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26994552).

18484272 is an abundant number, since it is smaller than the sum of its proper divisors (35504832).

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

18484272 is a wasteful number, since it uses less digits than its factorization.

18484272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618 (or 5609 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 18484272 is about 4299.3339018969. Note that the first 3 decimals coincide. The cubic root of 18484272 is about 264.4036524786.

The spelling of 18484272 in words is "eighteen million, four hundred eighty-four thousand, two hundred seventy-two".