18481528 has 64 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 7869312.

The previous prime is 18481523. The next prime is 18481543. The reversal of 18481528 is 82518481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18481523) 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, 92773 + ... + 92971.

It is an arithmetic number, because the mean of its divisors is an integer number (630000).

Almost surely, 2^18481528 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 18481528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20160000).

18481528 is an abundant number, since it is smaller than the sum of its proper divisors (21838472).

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

18481528 is a wasteful number, since it uses less digits than its factorization.

18481528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 280 counting only the distinct ones).

The product of its digits is 20480, while the sum is 37.

The square root of 18481528 is about 4299.0147708516. The cubic root of 18481528 is about 264.3905682103.

The spelling of 18481528 in words is "eighteen million, four hundred eighty-one thousand, five hundred twenty-eight".