830640 has 40 divisors (see below), whose sum is σ = 2575728. Its totient is φ = 221440.

The previous prime is 830639. The next prime is 830657. The reversal of 830640 is 46038.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491 + ... + 1970.

2⁸³⁰⁶⁴⁰ is an apocalyptic number.

830640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

830640 is an abundant number, since it is smaller than the sum of its proper divisors (1745088).

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

830640 is a wasteful number, since it uses less digits than its factorization.

830640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3471 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 830640 is about 911.3945358625. The cubic root of 830640 is about 94.0021125223.

Adding to 830640 its reverse (46038), we get a palindrome (876678).

The spelling of 830640 in words is "eight hundred thirty thousand, six hundred forty".