1609927940 has 12 divisors (see below), whose sum is σ = 3380848716. Its totient is φ = 643971168.

The previous prime is 1609927933. The next prime is 1609927967. The reversal of 1609927940 is 497299061.

It can be written as a sum of positive squares in 2 ways, for example, as 450797824 + 1159130116 = 21232^2 + 34046^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40248179 + ... + 40248218.

It is an arithmetic number, because the mean of its divisors is an integer number (281737393).

Almost surely, 2^1609927940 is an apocalyptic number.

1609927940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1609927940 is an abundant number, since it is smaller than the sum of its proper divisors (1770920776).

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

1609927940 is a wasteful number, since it uses less digits than its factorization.

1609927940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80496406 (or 80496404 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1609927940 is about 40123.9073371475. The cubic root of 1609927940 is about 1172.0212316623.

The spelling of 1609927940 in words is "one billion, six hundred nine million, nine hundred twenty-seven thousand, nine hundred forty".