1890855 has 12 divisors (see below), whose sum is σ = 3277560. Its totient is φ = 1008432.

The previous prime is 1890851. The next prime is 1890869. The reversal of 1890855 is 5580981.

It is not a de Polignac number, because 1890855 - 2² = 1890851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20965 + ... + 21054.

It is an arithmetic number, because the mean of its divisors is an integer number (273130).

2^1890855 is an apocalyptic number.

1890855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1890855 is a deficient number, since it is larger than the sum of its proper divisors (1386705).

1890855 is a wasteful number, since it uses less digits than its factorization.

1890855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42030 (or 42027 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1890855 is about 1375.0836338201. The cubic root of 1890855 is about 123.6572000933.

The spelling of 1890855 in words is "one million, eight hundred ninety thousand, eight hundred fifty-five".