1890918667 has 12 divisors (see below), whose sum is σ = 2099040048. Its totient is φ = 1701986000.

The previous prime is 1890918649. The next prime is 1890918691. The reversal of 1890918667 is 7668190981.

It is a de Polignac number, because none of the positive numbers 2^k-1890918667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890918637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65143 + ... + 89584.

It is an arithmetic number, because the mean of its divisors is an integer number (174920004).

Almost surely, 2^1890918667 is an apocalyptic number.

1890918667 is a deficient number, since it is larger than the sum of its proper divisors (208121381).

1890918667 is a wasteful number, since it uses less digits than its factorization.

1890918667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154850 (or 154839 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 1890918667 is about 43484.6946292601. The cubic root of 1890918667 is about 1236.5858796535.

The spelling of 1890918667 in words is "one billion, eight hundred ninety million, nine hundred eighteen thousand, six hundred sixty-seven".