16220740 has 12 divisors (see below), whose sum is σ = 34063596. Its totient is φ = 6488288.

The previous prime is 16220713. The next prime is 16220759. The reversal of 16220740 is 4702261.

It can be written as a sum of positive squares in 2 ways, for example, as 3504384 + 12716356 = 1872^2 + 3566^2 .

It is a super-2 number, since 2×16220740² = 526224812295200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405499 + ... + 405538.

It is an arithmetic number, because the mean of its divisors is an integer number (2838633).

Almost surely, 2^16220740 is an apocalyptic number.

16220740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16220740 is an abundant number, since it is smaller than the sum of its proper divisors (17842856).

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

16220740 is a wasteful number, since it uses less digits than its factorization.

16220740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811046 (or 811044 counting only the distinct ones).

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

The square root of 16220740 is about 4027.4979826190. The cubic root of 16220740 is about 253.1377337495.

It can be divided in two parts, 162 and 20740, that added together give a palindrome (20902).

The spelling of 16220740 in words is "sixteen million, two hundred twenty thousand, seven hundred forty".