1388286 has 32 divisors (see below), whose sum is σ = 3156480. Its totient is φ = 452088.

The previous prime is 1388279. The next prime is 1388287. The reversal of 1388286 is 6828831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2265 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (98640).

2^1388286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578240).

1388286 is an abundant number, since it is smaller than the sum of its proper divisors (1768194).

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

1388286 is a wasteful number, since it uses less digits than its factorization.

1388286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 599 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1388286 is about 1178.2554901209. The cubic root of 1388286 is about 111.5560122631.

The spelling of 1388286 in words is "one million, three hundred eighty-eight thousand, two hundred eighty-six".