16220424 has 32 divisors (see below), whose sum is σ = 44238240. Its totient is φ = 4915200.

The previous prime is 16220423. The next prime is 16220429. The reversal of 16220424 is 42402261.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 16220424.

It is not an unprimeable number, because it can be changed into a prime (16220423) 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, 30457 + ... + 30984.

It is an arithmetic number, because the mean of its divisors is an integer number (1382445).

Almost surely, 2^16220424 is an apocalyptic number.

It is an amenable number.

16220424 is an abundant number, since it is smaller than the sum of its proper divisors (28017816).

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

16220424 is a wasteful number, since it uses less digits than its factorization.

16220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61461 (or 61457 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 16220424 is about 4027.4587521165. The cubic root of 16220424 is about 253.1360899272.

Adding to 16220424 its reverse (42402261), we get a palindrome (58622685).

The spelling of 16220424 in words is "sixteen million, two hundred twenty thousand, four hundred twenty-four".