18401248 has 36 divisors (see below), whose sum is σ = 37208808. Its totient is φ = 8957760.

The previous prime is 18401221. The next prime is 18401261. The reversal of 18401248 is 84210481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59013 + ... + 59323.

It is an arithmetic number, because the mean of its divisors is an integer number (1033578).

Almost surely, 2^18401248 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 18401248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18604404).

18401248 is an abundant number, since it is smaller than the sum of its proper divisors (18807560).

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

18401248 is an equidigital number, since it uses as much as digits as its factorization.

18401248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18401248 is about 4289.6675861889. The cubic root of 18401248 is about 264.0071929476.

The spelling of 18401248 in words is "eighteen million, four hundred one thousand, two hundred forty-eight".