16628240 has 40 divisors (see below), whose sum is σ = 38836800. Its totient is φ = 6621056.

The previous prime is 16628233. The next prime is 16628243. The reversal of 16628240 is 4282661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16628243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27461 + ... + 28059.

It is an arithmetic number, because the mean of its divisors is an integer number (970920).

Almost surely, 2^16628240 is an apocalyptic number.

16628240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16628240 is an abundant number, since it is smaller than the sum of its proper divisors (22208560).

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

16628240 is a wasteful number, since it uses less digits than its factorization.

16628240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 16628240 is about 4077.7739025110. The cubic root of 16628240 is about 255.2400149516.

The spelling of 16628240 in words is "sixteen million, six hundred twenty-eight thousand, two hundred forty".