1606220620 has 24 divisors (see below), whose sum is σ = 3389058288. Its totient is φ = 639441600.

The previous prime is 1606220611. The next prime is 1606220669. The reversal of 1606220620 is 260226061.

It is a super-2 number, since 2×1606220620² = 5159889360226368800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186091 + ... + 194530.

It is an arithmetic number, because the mean of its divisors is an integer number (141210762).

Almost surely, 2^1606220620 is an apocalyptic number.

1606220620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606220620 is an abundant number, since it is smaller than the sum of its proper divisors (1782837668).

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

1606220620 is a wasteful number, since it uses less digits than its factorization.

1606220620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380841 (or 380839 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1606220620 is about 40077.6823182180. The cubic root of 1606220620 is about 1171.1209020752.

Adding to 1606220620 its reverse (260226061), we get a palindrome (1866446681).

The spelling of 1606220620 in words is "one billion, six hundred six million, two hundred twenty thousand, six hundred twenty".