16220407 has 8 divisors (see below), whose sum is σ = 18564896. Its totient is φ = 13882752.

The previous prime is 16220401. The next prime is 16220411. The reversal of 16220407 is 70402261.

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

It is a cyclic number.

It is not a de Polignac number, because 16220407 - 2¹⁹ = 15696119 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 5323 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (2320612).

Almost surely, 2^16220407 is an apocalyptic number.

16220407 is a deficient number, since it is larger than the sum of its proper divisors (2344489).

16220407 is an equidigital number, since it uses as much as digits as its factorization.

16220407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 16220407 is about 4027.4566416040. The cubic root of 16220407 is about 253.1360014931.

Adding to 16220407 its reverse (70402261), we get a palindrome (86622668).

The spelling of 16220407 in words is "sixteen million, two hundred twenty thousand, four hundred seven".