7218746 has 8 divisors (see below), whose sum is σ = 11398080. Its totient is φ = 3419388.

The previous prime is 7218721. The next prime is 7218749. The reversal of 7218746 is 6478127.

It is a happy number.

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

It is a super-2 number, since 2×7218746² = 104220587625032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7218749) 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, 94946 + ... + 95021.

It is an arithmetic number, because the mean of its divisors is an integer number (1424760).

Almost surely, 2^7218746 is an apocalyptic number.

7218746 is a deficient number, since it is larger than the sum of its proper divisors (4179334).

7218746 is a wasteful number, since it uses less digits than its factorization.

7218746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189988.

The product of its digits is 18816, while the sum is 35.

The square root of 7218746 is about 2686.7724131381. The cubic root of 7218746 is about 193.2653156160.

The spelling of 7218746 in words is "seven million, two hundred eighteen thousand, seven hundred forty-six".