16220144 has 20 divisors (see below), whose sum is σ = 31943640. Its totient is φ = 7976640.

The previous prime is 16220143. The next prime is 16220177. The reversal of 16220144 is 44102261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7334 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (1597182).

Almost surely, 2^16220144 is an apocalyptic number.

It is an amenable number.

16220144 is a deficient number, since it is larger than the sum of its proper divisors (15723496).

16220144 is a wasteful number, since it uses less digits than its factorization.

16220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688 (or 16682 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 16220144 is about 4027.4239905925. The cubic root of 16220144 is about 253.1346333579.

The spelling of 16220144 in words is "sixteen million, two hundred twenty thousand, one hundred forty-four".