1896990 has 32 divisors (see below), whose sum is σ = 4678560. Its totient is φ = 491904.

The previous prime is 1896989. The next prime is 1896991. The reversal of 1896990 is 996981.

It is an interprime number because it is at equal distance from previous prime (1896989) and next prime (1896991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256 + ... + 1964.

It is an arithmetic number, because the mean of its divisors is an integer number (146205).

2^1896990 is an apocalyptic number.

1896990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1896990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339280).

1896990 is an abundant number, since it is smaller than the sum of its proper divisors (2781570).

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

1896990 is a wasteful number, since it uses less digits than its factorization.

1896990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1896990 is about 1377.3126006829. The cubic root of 1896990 is about 123.7907936116.

Subtracting from 1896990 its reverse (996981), we obtain a palindrome (900009).

The spelling of 1896990 in words is "one million, eight hundred ninety-six thousand, nine hundred ninety".