1890104689 has 16 divisors (see below), whose sum is σ = 2177961984. Its totient is φ = 1624165200.

The previous prime is 1890104687. The next prime is 1890104717. The reversal of 1890104689 is 9864010981.

It is a cyclic number.

It is not a de Polignac number, because 1890104689 - 2¹ = 1890104687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1890104687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49789 + ... + 79114.

It is an arithmetic number, because the mean of its divisors is an integer number (136122624).

Almost surely, 2^1890104689 is an apocalyptic number.

It is an amenable number.

1890104689 is a deficient number, since it is larger than the sum of its proper divisors (287857295).

1890104689 is a wasteful number, since it uses less digits than its factorization.

1890104689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128988.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 1890104689 is about 43475.3342597846. The cubic root of 1890104689 is about 1236.4084177347.

The spelling of 1890104689 in words is "one billion, eight hundred ninety million, one hundred four thousand, six hundred eighty-nine".