2001890064 has 20 divisors (see below), whose sum is σ = 5171549456. Its totient is φ = 667296672.

The previous prime is 2001890057. The next prime is 2001890089. The reversal of 2001890064 is 4600981002.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20852974 + ... + 20853069.

Almost surely, 2^2001890064 is an apocalyptic number.

2001890064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2001890064 is an abundant number, since it is smaller than the sum of its proper divisors (3169659392).

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

2001890064 is a wasteful number, since it uses less digits than its factorization.

2001890064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41706054 (or 41706048 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2001890064 is about 44742.4861177830. The cubic root of 2001890064 is about 1260.3178135062.

The spelling of 2001890064 in words is "two billion, one million, eight hundred ninety thousand, sixty-four".