1840284742 has 4 divisors (see below), whose sum is σ = 2760427116. Its totient is φ = 920142370.

The previous prime is 1840284707. The next prime is 1840284749. The reversal of 1840284742 is 2474820481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2474820481 = 7 ⋅353545783.

It is a junction number, because it is equal to n+sod(n) for n = 1840284695 and 1840284704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840284749) 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 as a sum of consecutive naturals, namely, 460071184 + ... + 460071187.

It is an arithmetic number, because the mean of its divisors is an integer number (690106779).

Almost surely, 2^1840284742 is an apocalyptic number.

1840284742 is a deficient number, since it is larger than the sum of its proper divisors (920142374).

1840284742 is an equidigital number, since it uses as much as digits as its factorization.

1840284742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920142373.

The product of its (nonzero) digits is 114688, while the sum is 40.

The square root of 1840284742 is about 42898.5400917094. The cubic root of 1840284742 is about 1225.4483416792.

The spelling of 1840284742 in words is "one billion, eight hundred forty million, two hundred eighty-four thousand, seven hundred forty-two".