1855322090 has 16 divisors (see below), whose sum is σ = 3354559488. Its totient is φ = 738800016.

The previous prime is 1855322059. The next prime is 1855322129. The reversal of 1855322090 is 902235581.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1855322090.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413762 + ... + 418221.

It is an arithmetic number, because the mean of its divisors is an integer number (209659968).

Almost surely, 2^1855322090 is an apocalyptic number.

1855322090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855322090 is a deficient number, since it is larger than the sum of its proper divisors (1499237398).

1855322090 is a wasteful number, since it uses less digits than its factorization.

1855322090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832213.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1855322090 is about 43073.4499430914. The cubic root of 1855322090 is about 1228.7770889002. Note that the first 3 decimals are identical.

The spelling of 1855322090 in words is "one billion, eight hundred fifty-five million, three hundred twenty-two thousand, ninety".