1890889290 has 48 divisors (see below), whose sum is σ = 4918481568. Its totient is φ = 504014688.

The previous prime is 1890889261. The next prime is 1890889303. The reversal of 1890889290 is 929880981.

It is a happy number.

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, 352569 + ... + 357891.

It is an arithmetic number, because the mean of its divisors is an integer number (102468366).

Almost surely, 2^1890889290 is an apocalyptic number.

1890889290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890889290 is an abundant number, since it is smaller than the sum of its proper divisors (3027592278).

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

1890889290 is a wasteful number, since it uses less digits than its factorization.

1890889290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9283 (or 9280 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 1890889290 is about 43484.3568424324. The cubic root of 1890889290 is about 1236.5794758224.

The spelling of 1890889290 in words is "one billion, eight hundred ninety million, eight hundred eighty-nine thousand, two hundred ninety".