1896660 has 72 divisors (see below), whose sum is σ = 5916456. Its totient is φ = 491520.

The previous prime is 1896659. The next prime is 1896667. The reversal of 1896660 is 666981.

It can be written as a sum of positive squares in 4 ways, for example, as 248004 + 1648656 = 498^2 + 1284^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7252 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (82173).

2^1896660 is an apocalyptic number.

1896660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1896660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2958228).

1896660 is an abundant number, since it is smaller than the sum of its proper divisors (4019796).

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

1896660 is a wasteful number, since it uses less digits than its factorization.

1896660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1896660 is about 1377.1927969605. The cubic root of 1896660 is about 123.7836149881.

It can be divided in two parts, 1896 and 660, that added together give a triangular number (2556 = T₇₁).

The spelling of 1896660 in words is "one million, eight hundred ninety-six thousand, six hundred sixty".