1842099890 has 16 divisors (see below), whose sum is σ = 3318240600. Its totient is φ = 736293120.

The previous prime is 1842099869. The next prime is 1842099901. The reversal of 1842099890 is 989902481.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 934463761 + 907636129 = 30569^2 + 30127^2 .

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54065 + ... + 81284.

Almost surely, 2^1842099890 is an apocalyptic number.

1842099890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1842099890 is a deficient number, since it is larger than the sum of its proper divisors (1476140710).

1842099890 is a wasteful number, since it uses less digits than its factorization.

1842099890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136717.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 1842099890 is about 42919.6911685068. The cubic root of 1842099890 is about 1225.8511125344.

The spelling of 1842099890 in words is "one billion, eight hundred forty-two million, ninety-nine thousand, eight hundred ninety".