820618 has 8 divisors (see below), whose sum is σ = 1248480. Its totient is φ = 404460.

The previous prime is 820609. The next prime is 820619. The reversal of 820618 is 816028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 820592 and 820601.

It is not an unprimeable number, because it can be changed into a prime (820619) 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, 2748 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (156060).

2⁸²⁰⁶¹⁸ is an apocalyptic number.

820618 is a deficient number, since it is larger than the sum of its proper divisors (427862).

820618 is a wasteful number, since it uses less digits than its factorization.

820618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 820618 is about 905.8796829602. The cubic root of 820618 is about 93.6225242259.

The spelling of 820618 in words is "eight hundred twenty thousand, six hundred eighteen".