16628271 has 32 divisors (see below), whose sum is σ = 25214976. Its totient is φ = 9660000.

The previous prime is 16628263. The next prime is 16628299. The reversal of 16628271 is 17282661.

It is not a de Polignac number, because 16628271 - 2³ = 16628263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110046 + ... + 110196.

It is an arithmetic number, because the mean of its divisors is an integer number (787968).

Almost surely, 2^16628271 is an apocalyptic number.

16628271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16628271 is a deficient number, since it is larger than the sum of its proper divisors (8586705).

16628271 is a wasteful number, since it uses less digits than its factorization.

16628271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its digits is 8064, while the sum is 33.

The square root of 16628271 is about 4077.7777036028. Note that the first 4 decimals coincide. The cubic root of 16628271 is about 255.2401735660.

The spelling of 16628271 in words is "sixteen million, six hundred twenty-eight thousand, two hundred seventy-one".