8221436 has 12 divisors (see below), whose sum is σ = 14602728. Its totient is φ = 4049232.

The previous prime is 8221427. The next prime is 8221439. The reversal of 8221436 is 6341228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15071 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (1216894).

Almost surely, 2^8221436 is an apocalyptic number.

It is an amenable number.

8221436 is a deficient number, since it is larger than the sum of its proper divisors (6381292).

8221436 is a wasteful number, since it uses less digits than its factorization.

8221436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30748 (or 30746 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 8221436 is about 2867.3046576881. The cubic root of 8221436 is about 201.8285314164.

The spelling of 8221436 in words is "eight million, two hundred twenty-one thousand, four hundred thirty-six".