1083820 has 24 divisors (see below), whose sum is σ = 2326464. Its totient is φ = 423936.

The previous prime is 1083809. The next prime is 1083827. The reversal of 1083820 is 283801.

1083820 = T₄₁₉ + T₄₂₀ + ... + T₄₃₀.

It is a junction number, because it is equal to n+sod(n) for n = 1083791 and 1083800.

It is not an unprimeable number, because it can be changed into a prime (1083827) 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, 364 + ... + 1516.

It is an arithmetic number, because the mean of its divisors is an integer number (96936).

2^1083820 is an apocalyptic number.

1083820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1083820 is an abundant number, since it is smaller than the sum of its proper divisors (1242644).

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

1083820 is a wasteful number, since it uses less digits than its factorization.

1083820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1083820 is about 1041.0667605874. The cubic root of 1083820 is about 102.7193794261.

The spelling of 1083820 in words is "one million, eighty-three thousand, eight hundred twenty".