1809428742 has 36 divisors (see below), whose sum is σ = 4278246804. Its totient is φ = 548130360.

The previous prime is 1809428737. The next prime is 1809428749. The reversal of 1809428742 is 2478249081.

1809428742 is a `hidden beast` number, since 180 + 9 + 428 + 7 + 42 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809428749) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 597043 + ... + 600065.

It is an arithmetic number, because the mean of its divisors is an integer number (118840189).

Almost surely, 2^1809428742 is an apocalyptic number.

1809428742 is an abundant number, since it is smaller than the sum of its proper divisors (2468818062).

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

1809428742 is an equidigital number, since it uses as much as digits as its factorization.

1809428742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065 (or 3039 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1809428742 is about 42537.3805258387. The cubic root of 1809428742 is about 1218.5606832406.

The spelling of 1809428742 in words is "one billion, eight hundred nine million, four hundred twenty-eight thousand, seven hundred forty-two".