1889701920 has 384 divisors, whose sum is σ = 6884559360. Its totient is φ = 483840000.

The previous prime is 1889701903. The next prime is 1889701921. The reversal of 1889701920 is 291079881.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1889701921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18709870 + ... + 18709970.

It is an arithmetic number, because the mean of its divisors is an integer number (17928540).

Almost surely, 2^1889701920 is an apocalyptic number.

1889701920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1889701920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442279680).

1889701920 is an abundant number, since it is smaller than the sum of its proper divisors (4994857440).

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

1889701920 is a wasteful number, since it uses less digits than its factorization.

1889701920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 1889701920 is about 43470.7018576880. The cubic root of 1889701920 is about 1236.3205879685.

The spelling of 1889701920 in words is "one billion, eight hundred eighty-nine million, seven hundred one thousand, nine hundred twenty".