1208820 has 24 divisors (see below), whose sum is σ = 3384864. Its totient is φ = 322336.

The previous prime is 1208813. The next prime is 1208821. The reversal of 1208820 is 288021.

It is a super-2 number, since 2×1208820² = 2922491584800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208821) 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 7 ways as a sum of consecutive naturals, for example, 10014 + ... + 10133.

It is an arithmetic number, because the mean of its divisors is an integer number (141036).

2^1208820 is an apocalyptic number.

1208820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208820 is an abundant number, since it is smaller than the sum of its proper divisors (2176044).

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

1208820 is a wasteful number, since it uses less digits than its factorization.

1208820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20159 (or 20157 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1208820 is about 1099.4635055335. The cubic root of 1208820 is about 106.5255729988.

The spelling of 1208820 in words is "one million, two hundred eight thousand, eight hundred twenty".