16622417 has 18 divisors (see below), whose sum is σ = 20036754. Its totient is φ = 13749120.

The previous prime is 16622407. The next prime is 16622513. The reversal of 16622417 is 71422661.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 3013696 = 3689^2 + 1736^2 .

It is not a de Polignac number, because 16622417 - 2¹² = 16618321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16622417.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46913 + ... + 47265.

It is an arithmetic number, because the mean of its divisors is an integer number (1113153).

Almost surely, 2^16622417 is an apocalyptic number.

It is an amenable number.

16622417 is a deficient number, since it is larger than the sum of its proper divisors (3414337).

16622417 is an equidigital number, since it uses as much as digits as its factorization.

16622417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 391 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 16622417 is about 4077.0598474881. The cubic root of 16622417 is about 255.2102175280.

The spelling of 16622417 in words is "sixteen million, six hundred twenty-two thousand, four hundred seventeen".