1388830 has 8 divisors (see below), whose sum is σ = 2499912. Its totient is φ = 555528.

The previous prime is 1388819. The next prime is 1388837. The reversal of 1388830 is 388831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1388792 and 1388801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69432 + ... + 69451.

It is an arithmetic number, because the mean of its divisors is an integer number (312489).

2^1388830 is an apocalyptic number.

1388830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388830 is a deficient number, since it is larger than the sum of its proper divisors (1111082).

1388830 is a wasteful number, since it uses less digits than its factorization.

1388830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138890.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1388830 is about 1178.4863172731. The cubic root of 1388830 is about 111.5705814382.

Subtracting from 1388830 its reverse (388831), we obtain a palindrome (999999).

The spelling of 1388830 in words is "one million, three hundred eighty-eight thousand, eight hundred thirty".