1380388 has 24 divisors (see below), whose sum is σ = 2610720. Its totient is φ = 636480.

The previous prime is 1380377. The next prime is 1380389. The reversal of 1380388 is 8830831.

It is not an unprimeable number, because it can be changed into a prime (1380389) 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, 2895 + ... + 3337.

It is an arithmetic number, because the mean of its divisors is an integer number (108780).

2^1380388 is an apocalyptic number.

It is an amenable number.

1380388 is a deficient number, since it is larger than the sum of its proper divisors (1230332).

1380388 is a wasteful number, since it uses less digits than its factorization.

1380388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

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

The square root of 1380388 is about 1174.8991446077. The cubic root of 1380388 is about 111.3440613405.

The spelling of 1380388 in words is "one million, three hundred eighty thousand, three hundred eighty-eight".