1840206445 has 16 divisors (see below), whose sum is σ = 2753140608. Its totient is φ = 1147141440.

The previous prime is 1840206427. The next prime is 1840206451. The reversal of 1840206445 is 5446020481.

It is not a de Polignac number, because 1840206445 - 2¹³ = 1840198253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1840206445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2389494 + ... + 2390263.

It is an arithmetic number, because the mean of its divisors is an integer number (172071288).

Almost surely, 2^1840206445 is an apocalyptic number.

It is an amenable number.

1840206445 is a deficient number, since it is larger than the sum of its proper divisors (912934163).

1840206445 is a wasteful number, since it uses less digits than its factorization.

1840206445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779780.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 1840206445 is about 42897.6274984993. The cubic root of 1840206445 is about 1225.4309620699.

The spelling of 1840206445 in words is "one billion, eight hundred forty million, two hundred six thousand, four hundred forty-five".