8220996 has 144 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 2073600.

The previous prime is 8220937. The next prime is 8221009. The reversal of 8220996 is 6990228.

8220996 = T₂₈₃ + T₂₈₄ + ... + T₄₁₅.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8220996.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81346 + ... + 81446.

It is an arithmetic number, because the mean of its divisors is an integer number (185640).

Almost surely, 2^8220996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8220996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13366080).

8220996 is an abundant number, since it is smaller than the sum of its proper divisors (18511164).

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

8220996 is a wasteful number, since it uses less digits than its factorization.

8220996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 8220996 is about 2867.2279295515. The cubic root of 8220996 is about 201.8249308233.

It can be divided in two parts, 8220 and 996, that added together give a square (9216 = 96²).

The spelling of 8220996 in words is "eight million, two hundred twenty thousand, nine hundred ninety-six".