1003820 has 24 divisors (see below), whose sum is σ = 2150064. Its totient is φ = 393536.

The previous prime is 1003819. The next prime is 1003841. The reversal of 1003820 is 283001.

1003820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1003795 and 1003804.

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, 587 + ... + 1533.

It is an arithmetic number, because the mean of its divisors is an integer number (89586).

2^1003820 is an apocalyptic number.

1003820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003820 is an abundant number, since it is smaller than the sum of its proper divisors (1146244).

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

1003820 is a wasteful number, since it uses less digits than its factorization.

1003820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1003820 is about 1001.9081794256. The cubic root of 1003820 is about 100.1271715388.

Adding to 1003820 its reverse (283001), we get a palindrome (1286821).

The spelling of 1003820 in words is "one million, three thousand, eight hundred twenty".