1800098090 has 16 divisors (see below), whose sum is σ = 3703059072. Its totient is φ = 617176464.

The previous prime is 1800098087. The next prime is 1800098099. The reversal of 1800098090 is 908900081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

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 1800098090.

It is not an unprimeable number, because it can be changed into a prime (1800098099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12857774 + ... + 12857913.

It is an arithmetic number, because the mean of its divisors is an integer number (231441192).

Almost surely, 2^1800098090 is an apocalyptic number.

1800098090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800098090 is an abundant number, since it is smaller than the sum of its proper divisors (1902960982).

1800098090 is a wasteful number, since it uses less digits than its factorization.

1800098090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25715701.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1800098090 is about 42427.5628571805. The cubic root of 1800098090 is about 1216.4624951279.

The spelling of 1800098090 in words is "one billion, eight hundred million, ninety-eight thousand, ninety".