1809028742 has 12 divisors (see below), whose sum is σ = 2748345516. Its totient is φ = 893058660.

The previous prime is 1809028721. The next prime is 1809028747. The reversal of 1809028742 is 2478209081.

It is a self number, because there is not a number n which added to its sum of digits gives 1809028742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809028747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59984 + ... + 84947.

It is an arithmetic number, because the mean of its divisors is an integer number (229028793).

Almost surely, 2^1809028742 is an apocalyptic number.

1809028742 is a deficient number, since it is larger than the sum of its proper divisors (939316774).

1809028742 is an equidigital number, since it uses as much as digits as its factorization.

1809028742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145091 (or 145012 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 1809028742 is about 42532.6785189929. The cubic root of 1809028742 is about 1218.4708832237.

The spelling of 1809028742 in words is "one billion, eight hundred nine million, twenty-eight thousand, seven hundred forty-two".