18361488 has 40 divisors (see below), whose sum is σ = 48219136. Its totient is φ = 6019200.

The previous prime is 18361487. The next prime is 18361493. The reversal of 18361488 is 88416381.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208 + ... + 6063.

Almost surely, 2^18361488 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 18361488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24109568).

18361488 is an abundant number, since it is smaller than the sum of its proper divisors (29857648).

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

18361488 is a wasteful number, since it uses less digits than its factorization.

18361488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343 (or 6337 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 18361488 is about 4285.0306883382. The cubic root of 18361488 is about 263.8169070243.

The spelling of 18361488 in words is "eighteen million, three hundred sixty-one thousand, four hundred eighty-eight".