16650240 has 104 divisors (see below), whose sum is σ = 53470848. Its totient is φ = 4423680.

The previous prime is 16650239. The next prime is 16650241. The reversal of 16650240 is 4205661.

It is an interprime number because it is at equal distance from previous prime (16650239) and next prime (16650241).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 8 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16650240.

It is not an unprimeable number, because it can be changed into a prime (16650241) 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, 61305 + ... + 61575.

Almost surely, 2^16650240 is an apocalyptic number.

16650240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16650240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26735424).

16650240 is an abundant number, since it is smaller than the sum of its proper divisors (36820608).

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

16650240 is an equidigital number, since it uses as much as digits as its factorization.

16650240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 16650240 is about 4080.4705610995. The cubic root of 16650240 is about 255.3525304817.

The spelling of 16650240 in words is "sixteen million, six hundred fifty thousand, two hundred forty".