1900206 has 64 divisors (see below), whose sum is σ = 5276160. Its totient is φ = 492480.

The previous prime is 1900201. The next prime is 1900219. The reversal of 1900206 is 6020091.

It is a super-2 number, since 2×1900206² = 7221565684872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3930 + ... + 4386.

It is an arithmetic number, because the mean of its divisors is an integer number (82440).

2^1900206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1900206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2638080).

1900206 is an abundant number, since it is smaller than the sum of its proper divisors (3375954).

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

1900206 is a wasteful number, since it uses less digits than its factorization.

1900206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1900206 is about 1378.4795972375. The cubic root of 1900206 is about 123.8607090090.

Adding to 1900206 its reverse (6020091), we get a palindrome (7920297).

Subtracting 1900206 from its reverse (6020091), we obtain a triangular number (4119885 = T₂₈₇₀).

The spelling of 1900206 in words is "one million, nine hundred thousand, two hundred six".