16626240 has 168 divisors, whose sum is σ = 59911488. Its totient is φ = 4224000.

The previous prime is 16626229. The next prime is 16626241. The reversal of 16626240 is 4262661.

It is a happy number.

16626240 is a `hidden beast` number, since 16 + 626 + 24 + 0 = 666.

16626240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16626241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66115 + ... + 66365.

It is an arithmetic number, because the mean of its divisors is an integer number (356616).

Almost surely, 2^16626240 is an apocalyptic number.

16626240 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 16626240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29955744).

16626240 is an abundant number, since it is smaller than the sum of its proper divisors (43285248).

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

16626240 is a wasteful number, since it uses less digits than its factorization.

16626240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 16626240 is about 4077.5286632959. The cubic root of 16626240 is about 255.2297813470.

The spelling of 16626240 in words is "sixteen million, six hundred twenty-six thousand, two hundred forty".