1840890204 has 18 divisors (see below), whose sum is σ = 4653361440. Its totient is φ = 613630056.

The previous prime is 1840890197. The next prime is 1840890223. The reversal of 1840890204 is 4020980481.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 51135839 = 1840890204 / (1 + 8 + 4 + 0 + 8 + 9 + 0 + 2 + 0 + 4).

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 25567884 + ... + 25567955.

It is an arithmetic number, because the mean of its divisors is an integer number (258520080).

Almost surely, 2^1840890204 is an apocalyptic number.

It is an amenable number.

1840890204 is an abundant number, since it is smaller than the sum of its proper divisors (2812471236).

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

1840890204 is a wasteful number, since it uses less digits than its factorization.

1840890204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51135849 (or 51135844 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1840890204 is about 42905.5964181830. The cubic root of 1840890204 is about 1225.5827196249.

The spelling of 1840890204 in words is "one billion, eight hundred forty million, eight hundred ninety thousand, two hundred four".