8220742 has 16 divisors (see below), whose sum is σ = 12563712. Its totient is φ = 4033800.

The previous prime is 8220733. The next prime is 8220743. The reversal of 8220742 is 2470228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49143 + ... + 49309.

It is an arithmetic number, because the mean of its divisors is an integer number (785232).

Almost surely, 2^8220742 is an apocalyptic number.

8220742 is a deficient number, since it is larger than the sum of its proper divisors (4342970).

8220742 is a wasteful number, since it uses less digits than its factorization.

8220742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 8220742 is about 2867.1836355560. The cubic root of 8220742 is about 201.8228522406.

The spelling of 8220742 in words is "eight million, two hundred twenty thousand, seven hundred forty-two".