1656489320 has 16 divisors (see below), whose sum is σ = 3727101060. Its totient is φ = 662595712.

The previous prime is 1656489319. The next prime is 1656489323. The reversal of 1656489320 is 239846561.

It can be written as a sum of positive squares in 2 ways, for example, as 1637497156 + 18992164 = 40466^2 + 4358^2 .

It is not an unprimeable number, because it can be changed into a prime (1656489323) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20706077 + ... + 20706156.

Almost surely, 2^1656489320 is an apocalyptic number.

1656489320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656489320 is an abundant number, since it is smaller than the sum of its proper divisors (2070611740).

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

1656489320 is a wasteful number, since it uses less digits than its factorization.

1656489320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41412244 (or 41412240 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1656489320 is about 40699.9916461908. The cubic root of 1656489320 is about 1183.2128567861.

The spelling of 1656489320 in words is "one billion, six hundred fifty-six million, four hundred eighty-nine thousand, three hundred twenty".