16616428 has 6 divisors (see below), whose sum is σ = 29078756. Its totient is φ = 8308212.

The previous prime is 16616423. The next prime is 16616437. The reversal of 16616428 is 82461661.

It is a super-2 number, since 2×16616428² = 552211358958368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16616393 and 16616402.

It is not an unprimeable number, because it can be changed into a prime (16616423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077050 + ... + 2077057.

Almost surely, 2^16616428 is an apocalyptic number.

It is an amenable number.

16616428 is a deficient number, since it is larger than the sum of its proper divisors (12462328).

16616428 is a wasteful number, since it uses less digits than its factorization.

16616428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154111 (or 4154109 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 16616428 is about 4076.3253059588. The cubic root of 16616428 is about 255.1795633900.

The spelling of 16616428 in words is "sixteen million, six hundred sixteen thousand, four hundred twenty-eight".