8218742 has 8 divisors (see below), whose sum is σ = 14089296. Its totient is φ = 3522312.

The previous prime is 8218741. The next prime is 8218753. The reversal of 8218742 is 2478128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×8218742⁴ (a number of 29 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8218699 and 8218708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218741) 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, 293513 + ... + 293540.

It is an arithmetic number, because the mean of its divisors is an integer number (1761162).

Almost surely, 2^8218742 is an apocalyptic number.

8218742 is a deficient number, since it is larger than the sum of its proper divisors (5870554).

8218742 is a wasteful number, since it uses less digits than its factorization.

8218742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587062.

The product of its digits is 7168, while the sum is 32.

The square root of 8218742 is about 2866.8348400283. The cubic root of 8218742 is about 201.8064839516.

The spelling of 8218742 in words is "eight million, two hundred eighteen thousand, seven hundred forty-two".