18458648 has 16 divisors (see below), whose sum is σ = 37272480. Its totient is φ = 8519328.

The previous prime is 18458641. The next prime is 18458669. The reversal of 18458648 is 84685481.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18458599 and 18458608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18458641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88640 + ... + 88847.

It is an arithmetic number, because the mean of its divisors is an integer number (2329530).

Almost surely, 2^18458648 is an apocalyptic number.

It is an amenable number.

18458648 is an abundant number, since it is smaller than the sum of its proper divisors (18813832).

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

18458648 is a wasteful number, since it uses less digits than its factorization.

18458648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177506 (or 177502 counting only the distinct ones).

The product of its digits is 245760, while the sum is 44.

The square root of 18458648 is about 4296.3528719136. The cubic root of 18458648 is about 264.2814186091.

The spelling of 18458648 in words is "eighteen million, four hundred fifty-eight thousand, six hundred forty-eight".