16866287428 has 24 divisors (see below), whose sum is σ = 30655089920. Its totient is φ = 8111028960.

The previous prime is 16866287377. The next prime is 16866287483. The reversal of 16866287428 is 82478266861.

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, 397023 + ... + 437446.

Almost surely, 2^16866287428 is an apocalyptic number.

It is an amenable number.

16866287428 is a deficient number, since it is larger than the sum of its proper divisors (13788802492).

16866287428 is a wasteful number, since it uses less digits than its factorization.

16866287428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834667 (or 834665 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 58.

The spelling of 16866287428 in words is "sixteen billion, eight hundred sixty-six million, two hundred eighty-seven thousand, four hundred twenty-eight".