1609374890 has 16 divisors (see below), whose sum is σ = 2911888008. Its totient is φ = 640413696.

The previous prime is 1609374857. The next prime is 1609374901. The reversal of 1609374890 is 984739061.

It can be written as a sum of positive squares in 4 ways, for example, as 1457025241 + 152349649 = 38171^2 + 12343^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415007 + ... + 418866.

Almost surely, 2^1609374890 is an apocalyptic number.

1609374890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1609374890 is a deficient number, since it is larger than the sum of its proper divisors (1302513118).

1609374890 is a wasteful number, since it uses less digits than its factorization.

1609374890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834073.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1609374890 is about 40117.0149687137. The cubic root of 1609374890 is about 1171.8870102141.

The spelling of 1609374890 in words is "one billion, six hundred nine million, three hundred seventy-four thousand, eight hundred ninety".