1022788 has 36 divisors (see below), whose sum is σ = 2075220. Its totient is φ = 439296.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022788 is 8872201.

It can be written as a sum of positive squares in 6 ways, for example, as 161604 + 861184 = 402^2 + 928^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11448 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (57645).

2^1022788 is an apocalyptic number.

It is an amenable number.

1022788 is an abundant number, since it is smaller than the sum of its proper divisors (1052432).

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

1022788 is a wasteful number, since it uses less digits than its factorization.

1022788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1022788 is about 1011.3298176164. The cubic root of 1022788 is about 100.7539020341.

Adding to 1022788 its reverse (8872201), we get a palindrome (9894989).

The spelling of 1022788 in words is "one million, twenty-two thousand, seven hundred eighty-eight".