1896640 has 28 divisors (see below), whose sum is σ = 4517136. Its totient is φ = 758528.

The previous prime is 1896617. The next prime is 1896647. The reversal of 1896640 is 466981.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1896596 and 1896605.

It is not an unprimeable number, because it can be changed into a prime (1896647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2644 + ... + 3283.

2^1896640 is an apocalyptic number.

1896640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1896640 is an abundant number, since it is smaller than the sum of its proper divisors (2620496).

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

1896640 is an equidigital number, since it uses as much as digits as its factorization.

1896640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5944 (or 5934 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1896640 is about 1377.1855357939. The cubic root of 1896640 is about 123.7831798933.

The spelling of 1896640 in words is "one million, eight hundred ninety-six thousand, six hundred forty".