1388056 has 32 divisors (see below), whose sum is σ = 2793600. Its totient is φ = 645120.

The previous prime is 1388053. The next prime is 1388059. The reversal of 1388056 is 6508831.

It is an interprime number because it is at equal distance from previous prime (1388053) and next prime (1388059).

It is a super-3 number, since 3×1388056³ = 8023100233351438848, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388053) 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, 7096 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (87300).

2^1388056 is an apocalyptic number.

It is an amenable number.

1388056 is an abundant number, since it is smaller than the sum of its proper divisors (1405544).

1388056 is a wasteful number, since it uses less digits than its factorization.

1388056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1388056 is about 1178.1578841564. The cubic root of 1388056 is about 111.5498513568.

The spelling of 1388056 in words is "one million, three hundred eighty-eight thousand, fifty-six".