16646140 has 24 divisors (see below), whose sum is σ = 39951072. Its totient is φ = 5707200.

The previous prime is 16646099. The next prime is 16646167. The reversal of 16646140 is 4164661.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 16646099 and 16646108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59311 + ... + 59590.

It is an arithmetic number, because the mean of its divisors is an integer number (1664628).

Almost surely, 2^16646140 is an apocalyptic number.

16646140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16646140 is an abundant number, since it is smaller than the sum of its proper divisors (23304932).

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

16646140 is a wasteful number, since it uses less digits than its factorization.

16646140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118917 (or 118915 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16646140 is about 4079.9681371305. The cubic root of 16646140 is about 255.3315691958.

The spelling of 16646140 in words is "sixteen million, six hundred forty-six thousand, one hundred forty".