1990000662 has 64 divisors (see below), whose sum is σ = 4361999040. Its totient is φ = 601565184.

The previous prime is 1990000643. The next prime is 1990000669. The reversal of 1990000662 is 2660000991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990000669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1200138 + ... + 1201794.

It is an arithmetic number, because the mean of its divisors is an integer number (68156235).

Almost surely, 2^1990000662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990000662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180999520).

1990000662 is an abundant number, since it is smaller than the sum of its proper divisors (2371998378).

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

1990000662 is a wasteful number, since it uses less digits than its factorization.

1990000662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1990000662 is about 44609.4234663485. The cubic root of 1990000662 is about 1257.8178114201.

The spelling of 1990000662 in words is "one billion, nine hundred ninety million, six hundred sixty-two", and thus it is an aban number.