1388828 has 24 divisors (see below), whose sum is σ = 2802912. Its totient is φ = 589824.

The previous prime is 1388819. The next prime is 1388837. The reversal of 1388828 is 8288831.

It is an interprime number because it is at equal distance from previous prime (1388819) and next prime (1388837).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1388791 and 1388800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5276 + ... + 5532.

It is an arithmetic number, because the mean of its divisors is an integer number (116788).

2^1388828 is an apocalyptic number.

It is an amenable number.

1388828 is an abundant number, since it is smaller than the sum of its proper divisors (1414084).

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

1388828 is a wasteful number, since it uses less digits than its factorization.

1388828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 1388828 is about 1178.4854687267. The cubic root of 1388828 is about 111.5705278821.

The spelling of 1388828 in words is "one million, three hundred eighty-eight thousand, eight hundred twenty-eight".