1384820 has 24 divisors (see below), whose sum is σ = 3079944. Its totient is φ = 521216.

The previous prime is 1384813. The next prime is 1384829. The reversal of 1384820 is 284831.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 1304164 = 284^2 + 1142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1384820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697 + ... + 2376.

It is an arithmetic number, because the mean of its divisors is an integer number (128331).

2^1384820 is an apocalyptic number.

1384820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1384820 is an abundant number, since it is smaller than the sum of its proper divisors (1695124).

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

1384820 is a wasteful number, since it uses less digits than its factorization.

1384820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4097 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1384820 is about 1176.7837524371. The cubic root of 1384820 is about 111.4630978447.

The spelling of 1384820 in words is "one million, three hundred eighty-four thousand, eight hundred twenty".