1000890220 has 72 divisors (see below), whose sum is σ = 2345181552. Its totient is φ = 358469760.

The previous prime is 1000890179. The next prime is 1000890223. The reversal of 1000890220 is 220980001.

1000890220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1000890191 and 1000890200.

It is not an unprimeable number, because it can be changed into a prime (1000890223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159054 + ... + 165226.

It is an arithmetic number, because the mean of its divisors is an integer number (32571966).

Almost surely, 2^1000890220 is an apocalyptic number.

1000890220 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 1000890220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172590776).

1000890220 is an abundant number, since it is smaller than the sum of its proper divisors (1344291332).

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

1000890220 is a wasteful number, since it uses less digits than its factorization.

1000890220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271 (or 6258 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1000890220 is about 31636.8490845722. The cubic root of 1000890220 is about 1000.2966519889.

The spelling of 1000890220 in words is "one billion, eight hundred ninety thousand, two hundred twenty".