1027820 has 24 divisors (see below), whose sum is σ = 2286144. Its totient is φ = 386816.

The previous prime is 1027799. The next prime is 1027841. The reversal of 1027820 is 287201.

It is an interprime number because it is at equal distance from previous prime (1027799) and next prime (1027841).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1027792 and 1027801.

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, 1172 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (95256).

2^1027820 is an apocalyptic number.

1027820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1027820 is an abundant number, since it is smaller than the sum of its proper divisors (1258324).

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

1027820 is a wasteful number, since it uses less digits than its factorization.

1027820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049 (or 3047 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1027820 is about 1013.8145787076. The cubic root of 1027820 is about 100.9188643560.

The spelling of 1027820 in words is "one million, twenty-seven thousand, eight hundred twenty".