1609235472 has 80 divisors (see below), whose sum is σ = 4494087360. Its totient is φ = 493257216.

The previous prime is 1609235437. The next prime is 1609235473. The reversal of 1609235472 is 2745329061.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1609235472.

It is not an unprimeable number, because it can be changed into a prime (1609235473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163063 + ... + 172649.

It is an arithmetic number, because the mean of its divisors is an integer number (56176092).

Almost surely, 2^1609235472 is an apocalyptic number.

1609235472 is a gapful number since it is divisible by the number (12) 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 1609235472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247043680).

1609235472 is an abundant number, since it is smaller than the sum of its proper divisors (2884851888).

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

1609235472 is a wasteful number, since it uses less digits than its factorization.

1609235472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880 (or 9874 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1609235472 is about 40115.2772893321. The cubic root of 1609235472 is about 1171.8531695674.

The spelling of 1609235472 in words is "one billion, six hundred nine million, two hundred thirty-five thousand, four hundred seventy-two".