1609484380 has 72 divisors (see below), whose sum is σ = 3981700800. Its totient is φ = 544811904.

The previous prime is 1609484351. The next prime is 1609484411. The reversal of 1609484380 is 834849061.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 67026 + ... + 87814.

It is an arithmetic number, because the mean of its divisors is an integer number (55301400).

Almost surely, 2^1609484380 is an apocalyptic number.

1609484380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1609484380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990850400).

1609484380 is an abundant number, since it is smaller than the sum of its proper divisors (2372216420).

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

1609484380 is a wasteful number, since it uses less digits than its factorization.

1609484380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891 (or 20882 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1609484380 is about 40118.3795784426. The cubic root of 1609484380 is about 1171.9135851283.

The spelling of 1609484380 in words is "one billion, six hundred nine million, four hundred eighty-four thousand, three hundred eighty".