1889422020 has 72 divisors (see below), whose sum is σ = 5886166104. Its totient is φ = 490226688.

The previous prime is 1889422013. The next prime is 1889422081. The reversal of 1889422020 is 202249881.

It can be written as a sum of positive squares in 4 ways, for example, as 397763136 + 1491658884 = 19944^2 + 38622^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135189 + ... + 148508.

It is an arithmetic number, because the mean of its divisors is an integer number (81752307).

Almost surely, 2^1889422020 is an apocalyptic number.

1889422020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1889422020 is an abundant number, since it is smaller than the sum of its proper divisors (3996744084).

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

1889422020 is a wasteful number, since it uses less digits than its factorization.

1889422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283749 (or 283744 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1889422020 is about 43467.4823287478. The cubic root of 1889422020 is about 1236.2595442635.

The spelling of 1889422020 in words is "one billion, eight hundred eighty-nine million, four hundred twenty-two thousand, twenty".