1022790 has 32 divisors (see below), whose sum is σ = 2486016. Its totient is φ = 269280.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022790 is 972201.

It is a happy number.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (77688).

2^1022790 is an apocalyptic number.

1022790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1022790 is an abundant number, since it is smaller than the sum of its proper divisors (1463226).

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

1022790 is a wasteful number, since it uses less digits than its factorization.

1022790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1022790 is about 1011.3308064130. The cubic root of 1022790 is about 100.7539677068.

Adding to 1022790 its reverse (972201), we get a palindrome (1994991).

The spelling of 1022790 in words is "one million, twenty-two thousand, seven hundred ninety".