1090020 has 48 divisors (see below), whose sum is σ = 3140928. Its totient is φ = 282240.

The previous prime is 1090013. The next prime is 1090021. The reversal of 1090020 is 200901.

1090020 = T₂₂₄ + T₂₂₅ + ... + T₂₆₀.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1089978 and 1090005.

It is not an unprimeable number, because it can be changed into a prime (1090021) 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, 1975 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (65436).

2^1090020 is an apocalyptic number.

1090020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1090020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570464).

1090020 is an abundant number, since it is smaller than the sum of its proper divisors (2050908).

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

1090020 is a wasteful number, since it uses less digits than its factorization.

1090020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1090020 is about 1044.0402291100. The cubic root of 1090020 is about 102.9148760982.

Adding to 1090020 its reverse (200901), we get a palindrome (1290921).

The spelling of 1090020 in words is "one million, ninety thousand, twenty".