8191020 has 48 divisors (see below), whose sum is σ = 23079168. Its totient is φ = 2170560.

The previous prime is 8190997. The next prime is 8191049. The reversal of 8191020 is 201918.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12337 + ... + 12983.

It is an arithmetic number, because the mean of its divisors is an integer number (480816).

Almost surely, 2^8191020 is an apocalyptic number.

It is an amenable number.

8191020 is an abundant number, since it is smaller than the sum of its proper divisors (14888148).

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

8191020 is a wasteful number, since it uses less digits than its factorization.

8191020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 8191020 is about 2861.9958071248. The cubic root of 8191020 is about 201.5793291038.

Adding to 8191020 its reverse (201918), we get a palindrome (8392938).

The spelling of 8191020 in words is "eight million, one hundred ninety-one thousand, twenty".