1809597472 has 48 divisors (see below), whose sum is σ = 3684586752. Its totient is φ = 873941760.

The previous prime is 1809597469. The next prime is 1809597479. The reversal of 1809597472 is 2747959081.

It is not an unprimeable number, because it can be changed into a prime (1809597479) 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 7 ways as a sum of consecutive naturals, for example, 636438 + ... + 639274.

It is an arithmetic number, because the mean of its divisors is an integer number (76762224).

Almost surely, 2^1809597472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1809597472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842293376).

1809597472 is an abundant number, since it is smaller than the sum of its proper divisors (1874989280).

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

1809597472 is a wasteful number, since it uses less digits than its factorization.

1809597472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3513 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1809597472 is about 42539.3637940202. The cubic root of 1809597472 is about 1218.5985591640.

The spelling of 1809597472 in words is "one billion, eight hundred nine million, five hundred ninety-seven thousand, four hundred seventy-two".