1906890 has 32 divisors (see below), whose sum is σ = 4847040. Its totient is φ = 478464.

The previous prime is 1906889. The next prime is 1906909. The reversal of 1906890 is 986091.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (151470).

2^1906890 is an apocalyptic number.

1906890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1906890 is an abundant number, since it is smaller than the sum of its proper divisors (2940150).

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

1906890 is a wasteful number, since it uses less digits than its factorization.

1906890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1906890 is about 1380.9018792079. The cubic root of 1906890 is about 124.0057662945.

The spelling of 1906890 in words is "one million, nine hundred six thousand, eight hundred ninety".