1889800090 has 36 divisors (see below), whose sum is σ = 3475186974. Its totient is φ = 739918528.

The previous prime is 1889800079. The next prime is 1889800093. The reversal of 1889800090 is 900089881.

It can be written as a sum of positive squares in 3 ways, for example, as 952154449 + 937645641 = 30857^2 + 30621^2 .

It is not an unprimeable number, because it can be changed into a prime (1889800093) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8110614 + ... + 8110846.

Almost surely, 2^1889800090 is an apocalyptic number.

1889800090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1889800090 is a deficient number, since it is larger than the sum of its proper divisors (1585386884).

1889800090 is an frugal number, since it uses more digits than its factorization.

1889800090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 1889800090 is about 43471.8309943347. The cubic root of 1889800090 is about 1236.3419965461.

The spelling of 1889800090 in words is "one billion, eight hundred eighty-nine million, eight hundred thousand, ninety".