1868190445 has 8 divisors (see below), whose sum is σ = 2445631200. Its totient is φ = 1358683920.

The previous prime is 1868190439. The next prime is 1868190449. The reversal of 1868190445 is 5440918681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1868190445 - 2¹¹ = 1868188397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868190395 and 1868190404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868190449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16983495 + ... + 16983604.

It is an arithmetic number, because the mean of its divisors is an integer number (305703900).

Almost surely, 2^1868190445 is an apocalyptic number.

It is an amenable number.

1868190445 is a deficient number, since it is larger than the sum of its proper divisors (577440755).

1868190445 is a wasteful number, since it uses less digits than its factorization.

1868190445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33967115.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 1868190445 is about 43222.5686996967. The cubic root of 1868190445 is about 1231.6114435426.

The spelling of 1868190445 in words is "one billion, eight hundred sixty-eight million, one hundred ninety thousand, four hundred forty-five".