16651428 has 24 divisors (see below), whose sum is σ = 39096288. Its totient is φ = 5515776.

The previous prime is 16651421. The next prime is 16651463. The reversal of 16651428 is 82415661.

16651428 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16651421) 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, 2301 + ... + 6212.

It is an arithmetic number, because the mean of its divisors is an integer number (1629012).

Almost surely, 2^16651428 is an apocalyptic number.

It is an amenable number.

16651428 is an abundant number, since it is smaller than the sum of its proper divisors (22444860).

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

16651428 is a wasteful number, since it uses less digits than its factorization.

16651428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683 (or 8681 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 16651428 is about 4080.6161299490. The cubic root of 16651428 is about 255.3586034991.

The spelling of 16651428 in words is "sixteen million, six hundred fifty-one thousand, four hundred twenty-eight".