1994890590 has 96 divisors (see below), whose sum is σ = 6466576896. Its totient is φ = 414521280.

The previous prime is 1994890561. The next prime is 1994890603. The reversal of 1994890590 is 950984991.

1994890590 is a `hidden beast` number, since 1 + 9 + 9 + 48 + 9 + 0 + 590 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137002 + ... + 150861.

It is an arithmetic number, because the mean of its divisors is an integer number (67360176).

Almost surely, 2^1994890590 is an apocalyptic number.

1994890590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1994890590 is an abundant number, since it is smaller than the sum of its proper divisors (4471686306).

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

1994890590 is a wasteful number, since it uses less digits than its factorization.

1994890590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287894 (or 287891 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 1994890590 is about 44664.1980785506. The cubic root of 1994890590 is about 1258.8472260721.

The spelling of 1994890590 in words is "one billion, nine hundred ninety-four million, eight hundred ninety thousand, five hundred ninety".