16220730 has 16 divisors (see below), whose sum is σ = 38929824. Its totient is φ = 4325520.

The previous prime is 16220713. The next prime is 16220759. The reversal of 16220730 is 3702261.

It is a happy number.

It is a super-2 number, since 2×16220730² = 526224163465800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16220697 and 16220706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270316 + ... + 270375.

It is an arithmetic number, because the mean of its divisors is an integer number (2433114).

Almost surely, 2^16220730 is an apocalyptic number.

16220730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16220730 is an abundant number, since it is smaller than the sum of its proper divisors (22709094).

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

16220730 is a wasteful number, since it uses less digits than its factorization.

16220730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540701.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 16220730 is about 4027.4967411532. The cubic root of 16220730 is about 253.1376817301.

Adding to 16220730 its reverse (3702261), we get a palindrome (19922991).

The spelling of 16220730 in words is "sixteen million, two hundred twenty thousand, seven hundred thirty".