1990206 has 12 divisors (see below), whose sum is σ = 4312152. Its totient is φ = 663396.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990206 is 6020991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55266 + ... + 55301.

It is an arithmetic number, because the mean of its divisors is an integer number (359346).

2^1990206 is an apocalyptic number.

1990206 is an abundant number, since it is smaller than the sum of its proper divisors (2321946).

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

1990206 is a wasteful number, since it uses less digits than its factorization.

1990206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110575 (or 110572 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1990206 is about 1410.7466108412. The cubic root of 1990206 is about 125.7861072530.

The spelling of 1990206 in words is "one million, nine hundred ninety thousand, two hundred six".