8220494 has 4 divisors (see below), whose sum is σ = 12330744. Its totient is φ = 4110246.

The previous prime is 8220493. The next prime is 8220497. The reversal of 8220494 is 4940228.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055122 + ... + 2055125.

It is an arithmetic number, because the mean of its divisors is an integer number (3082686).

Almost surely, 2^8220494 is an apocalyptic number.

8220494 is a deficient number, since it is larger than the sum of its proper divisors (4110250).

8220494 is a wasteful number, since it uses less digits than its factorization.

8220494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110249.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8220494 is about 2867.1403872151. The cubic root of 8220494 is about 201.8208227169.

The spelling of 8220494 in words is "eight million, two hundred twenty thousand, four hundred ninety-four".