1809021472 has 24 divisors (see below), whose sum is σ = 3567195072. Its totient is φ = 903067200.

The previous prime is 1809021457. The next prime is 1809021499. The reversal of 1809021472 is 2741209081.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24604 + ... + 64987.

It is an arithmetic number, because the mean of its divisors is an integer number (148633128).

Almost surely, 2^1809021472 is an apocalyptic number.

It is an amenable number.

1809021472 is a deficient number, since it is larger than the sum of its proper divisors (1758173600).

1809021472 is an equidigital number, since it uses as much as digits as its factorization.

1809021472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90232 (or 90224 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1809021472 is about 42532.5930552088. The cubic root of 1809021472 is about 1218.4692509859.

The spelling of 1809021472 in words is "one billion, eight hundred nine million, twenty-one thousand, four hundred seventy-two".