1768640 has 28 divisors (see below), whose sum is σ = 4212336. Its totient is φ = 707328.

The previous prime is 1768639. The next prime is 1768651. The reversal of 1768640 is 468671.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1768597 and 1768606.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2444 + ... + 3083.

2^1768640 is an apocalyptic number.

1768640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1768640 is an abundant number, since it is smaller than the sum of its proper divisors (2443696).

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

1768640 is an equidigital number, since it uses as much as digits as its factorization.

1768640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544 (or 5534 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1768640 is about 1329.9022520471. The cubic root of 1768640 is about 120.9334606725.

The spelling of 1768640 in words is "one million, seven hundred sixty-eight thousand, six hundred forty".