1022778 has 12 divisors (see below), whose sum is σ = 2216058. Its totient is φ = 340920.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022778 is 8772201.

It can be written as a sum of positive squares in only one way, i.e., 915849 + 106929 = 957^2 + 327^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1022773) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 28393 + ... + 28428.

2^1022778 is an apocalyptic number.

1022778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1022778 is an abundant number, since it is smaller than the sum of its proper divisors (1193280).

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

1022778 is a wasteful number, since it uses less digits than its factorization.

1022778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56829 (or 56826 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1022778 is about 1011.3248736188. The cubic root of 1022778 is about 100.7535736694.

Adding to 1022778 its reverse (8772201), we get a palindrome (9794979).

The spelling of 1022778 in words is "one million, twenty-two thousand, seven hundred seventy-eight".