1990489110 has 32 divisors (see below), whose sum is σ = 4783691520. Its totient is φ = 530072928.

The previous prime is 1990489091. The next prime is 1990489117. The reversal of 1990489110 is 119840991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990489117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22722 + ... + 67061.

It is an arithmetic number, because the mean of its divisors is an integer number (149490360).

Almost surely, 2^1990489110 is an apocalyptic number.

1990489110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990489110 is an abundant number, since it is smaller than the sum of its proper divisors (2793202410).

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

1990489110 is a wasteful number, since it uses less digits than its factorization.

1990489110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90532.

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 1990489110 is about 44614.8978481404. The cubic root of 1990489110 is about 1257.9207139545.

The spelling of 1990489110 in words is "one billion, nine hundred ninety million, four hundred eighty-nine thousand, one hundred ten".