1890481890 has 32 divisors (see below), whose sum is σ = 4949626176. Its totient is φ = 458298560.

The previous prime is 1890481883. The next prime is 1890481907. The reversal of 1890481890 is 981840981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2864037 + ... + 2864696.

It is an arithmetic number, because the mean of its divisors is an integer number (154675818).

Almost surely, 2^1890481890 is an apocalyptic number.

1890481890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890481890 is an abundant number, since it is smaller than the sum of its proper divisors (3059144286).

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

1890481890 is a wasteful number, since it uses less digits than its factorization.

1890481890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728754.

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 1890481890 is about 43479.6721468780. The cubic root of 1890481890 is about 1236.4906607049.

The spelling of 1890481890 in words is "one billion, eight hundred ninety million, four hundred eighty-one thousand, eight hundred ninety".