1022780 has 24 divisors (see below), whose sum is σ = 2343600. Its totient is φ = 371840.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022780 is 872201.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105 + ... + 2544.

It is an arithmetic number, because the mean of its divisors is an integer number (97650).

2^1022780 is an apocalyptic number.

1022780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022780 is an abundant number, since it is smaller than the sum of its proper divisors (1320820).

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

1022780 is a wasteful number, since it uses less digits than its factorization.

1022780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669 (or 4667 counting only the distinct ones).

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

The square root of 1022780 is about 1011.3258624202. The cubic root of 1022780 is about 100.7536393425.

Adding to 1022780 its reverse (872201), we get a palindrome (1894981).

It can be divided in two parts, 102 and 2780, that added together give a palindrome (2882).

The spelling of 1022780 in words is "one million, twenty-two thousand, seven hundred eighty".