16618240 has 36 divisors (see below), whose sum is σ = 39808944. Its totient is φ = 6646784.

The previous prime is 16618229. The next prime is 16618241. The reversal of 16618240 is 4281661.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 16618199 and 16618208.

It is not an unprimeable number, because it can be changed into a prime (16618241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5212 + ... + 7771.

It is an arithmetic number, because the mean of its divisors is an integer number (1105804).

Almost surely, 2^16618240 is an apocalyptic number.

16618240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16618240 is an abundant number, since it is smaller than the sum of its proper divisors (23190704).

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

16618240 is an equidigital number, since it uses as much as digits as its factorization.

16618240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13004 (or 12990 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 16618240 is about 4076.5475589032. The cubic root of 16618240 is about 255.1888387201.

The spelling of 16618240 in words is "sixteen million, six hundred eighteen thousand, two hundred forty".