16011640 has 16 divisors (see below), whose sum is σ = 36026280. Its totient is φ = 6404640.

The previous prime is 16011581. The next prime is 16011679. The reversal of 16011640 is 4611061.

It is a happy number.

16011640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200106 + ... + 200185.

Almost surely, 2^16011640 is an apocalyptic number.

16011640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16011640 is an abundant number, since it is smaller than the sum of its proper divisors (20014640).

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

16011640 is a wasteful number, since it uses less digits than its factorization.

16011640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400302 (or 400298 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16011640 is about 4001.4547354681. The cubic root of 16011640 is about 252.0453013376.

The spelling of 16011640 in words is "sixteen million, eleven thousand, six hundred forty".