1896390 has 48 divisors (see below), whose sum is σ = 5194800. Its totient is φ = 478656.

The previous prime is 1896353. The next prime is 1896407. The reversal of 1896390 is 936981.

1896390 is a `hidden beast` number, since 18 + 9 + 639 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1156 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (108225).

2^1896390 is an apocalyptic number.

1896390 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 1896390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597400).

1896390 is an abundant number, since it is smaller than the sum of its proper divisors (3298410).

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

1896390 is a wasteful number, since it uses less digits than its factorization.

1896390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1896390 is about 1377.0947679808. The cubic root of 1896390 is about 123.7777409495. Note that the first 4 decimals are identical.

The spelling of 1896390 in words is "one million, eight hundred ninety-six thousand, three hundred ninety".