1889955768 has 16 divisors (see below), whose sum is σ = 4724889480. Its totient is φ = 629985248.

The previous prime is 1889955761. The next prime is 1889955797. The reversal of 1889955768 is 8675599881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1889955699 and 1889955708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889955761) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39374055 + ... + 39374102.

Almost surely, 2^1889955768 is an apocalyptic number.

It is an amenable number.

1889955768 is an abundant number, since it is smaller than the sum of its proper divisors (2834933712).

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

1889955768 is a wasteful number, since it uses less digits than its factorization.

1889955768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78748166 (or 78748162 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 66.

The square root of 1889955768 is about 43473.6215192615. The cubic root of 1889955768 is about 1236.3759447514.

The spelling of 1889955768 in words is "one billion, eight hundred eighty-nine million, nine hundred fifty-five thousand, seven hundred sixty-eight".