16220406 has 8 divisors (see below), whose sum is σ = 32440824. Its totient is φ = 5406800.

The previous prime is 16220401. The next prime is 16220411. The reversal of 16220406 is 60402261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16220401) and next prime (16220411).

It is a sphenic number, since it is the product of 3 distinct primes.

16220406 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220401) 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, 1351695 + ... + 1351706.

It is an arithmetic number, because the mean of its divisors is an integer number (4055103).

Almost surely, 2^16220406 is an apocalyptic number.

16220406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16220406 is a wasteful number, since it uses less digits than its factorization.

16220406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703406.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16220406 is about 4027.4565174561. The cubic root of 16220406 is about 253.1359962911.

Adding to 16220406 its reverse (60402261), we get a palindrome (76622667).

The spelling of 16220406 in words is "sixteen million, two hundred twenty thousand, four hundred six".