1388862 has 48 divisors (see below), whose sum is σ = 3294720. Its totient is φ = 421200.

The previous prime is 1388837. The next prime is 1388873. The reversal of 1388862 is 2688831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10537 + ... + 10667.

It is an arithmetic number, because the mean of its divisors is an integer number (68640).

2^1388862 is an apocalyptic number.

It is a pronic number, being equal to 1178×1179.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647360).

1388862 is an abundant number, since it is smaller than the sum of its proper divisors (1905858).

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

1388862 is a wasteful number, since it uses less digits than its factorization.

1388862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 186 counting only the distinct ones).

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

The square root of 1388862 is about 1178.4998939330. The cubic root of 1388862 is about 111.5714383301.

It can be divided in two parts, 138886 and 2, that multiplied together give a palindrome (277772).

The spelling of 1388862 in words is "one million, three hundred eighty-eight thousand, eight hundred sixty-two".