1028622 has 32 divisors (see below), whose sum is σ = 2476800. Its totient is φ = 278208.

The previous prime is 1028617. The next prime is 1028647. The reversal of 1028622 is 2268201.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 154 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (77400).

2^1028622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1028622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238400).

1028622 is an abundant number, since it is smaller than the sum of its proper divisors (1448178).

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

1028622 is a wasteful number, since it uses less digits than its factorization.

1028622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1028622 is about 1014.2100374183. The cubic root of 1028622 is about 100.9451062683.

The spelling of 1028622 in words is "one million, twenty-eight thousand, six hundred twenty-two".