1388256 has 24 divisors (see below), whose sum is σ = 3644424. Its totient is φ = 462720.

The previous prime is 1388243. The next prime is 1388269. The reversal of 1388256 is 6528831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1388243) and next prime (1388269).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7135 + ... + 7326.

It is an arithmetic number, because the mean of its divisors is an integer number (151851).

2^1388256 is an apocalyptic number.

1388256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1388256 is an abundant number, since it is smaller than the sum of its proper divisors (2256168).

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

1388256 is a wasteful number, since it uses less digits than its factorization.

1388256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14474 (or 14466 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 1388256 is about 1178.2427593667. The cubic root of 1388256 is about 111.5552087052. Note that the first 3 decimals are identical.

It can be divided in two parts, 138825 and 6, that added together give a palindrome (138831).

The spelling of 1388256 in words is "one million, three hundred eighty-eight thousand, two hundred fifty-six".