8021208090 has 128 divisors (see below), whose sum is σ = 23353505280. Its totient is φ = 1721253888.

The previous prime is 8021208079. The next prime is 8021208137. The reversal of 8021208090 is 908021208.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1543216 + ... + 1548404.

It is an arithmetic number, because the mean of its divisors is an integer number (182449260).

Almost surely, 2^8021208090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8021208090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11676752640).

8021208090 is an abundant number, since it is smaller than the sum of its proper divisors (15332297190).

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

8021208090 is a wasteful number, since it uses less digits than its factorization.

8021208090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8021208090 is about 89561.1974573811. The cubic root of 8021208090 is about 2001.7657813826.

Adding to 8021208090 its reverse (908021208), we get a palindrome (8929229298).

The spelling of 8021208090 in words is "eight billion, twenty-one million, two hundred eight thousand, ninety".