1387218 has 16 divisors (see below), whose sum is σ = 3170880. Its totient is φ = 396336.

The previous prime is 1387213. The next prime is 1387231. The reversal of 1387218 is 8127831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1387213) 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, 16473 + ... + 16556.

It is an arithmetic number, because the mean of its divisors is an integer number (198180).

2^1387218 is an apocalyptic number.

1387218 is an abundant number, since it is smaller than the sum of its proper divisors (1783662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1387218 is a wasteful number, since it uses less digits than its factorization.

1387218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33041.

The product of its digits is 2688, while the sum is 30.

The square root of 1387218 is about 1177.8021905227. The cubic root of 1387218 is about 111.5273984698.

The spelling of 1387218 in words is "one million, three hundred eighty-seven thousand, two hundred eighteen".