8447018 has 4 divisors (see below), whose sum is σ = 12670530. Its totient is φ = 4223508.

The previous prime is 8446979. The next prime is 8447029. The reversal of 8447018 is 8107448.

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

It can be written as a sum of positive squares in only one way, i.e., 4313929 + 4133089 = 2077^2 + 2033^2 .

It is a super-2 number, since 2×8447018² = 142704226184648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111753 + ... + 2111756.

Almost surely, 2^8447018 is an apocalyptic number.

8447018 is a deficient number, since it is larger than the sum of its proper divisors (4223512).

8447018 is a wasteful number, since it uses less digits than its factorization.

8447018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223511.

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

The square root of 8447018 is about 2906.3754058965. The cubic root of 8447018 is about 203.6578430763.

The spelling of 8447018 in words is "eight million, four hundred forty-seven thousand, eighteen".