1388380 has 48 divisors (see below), whose sum is σ = 3419136. Its totient is φ = 463680.

The previous prime is 1388369. The next prime is 1388381. The reversal of 1388380 is 838831.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6475 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (71232).

2^1388380 is an apocalyptic number.

1388380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709568).

1388380 is an abundant number, since it is smaller than the sum of its proper divisors (2030756).

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

1388380 is a wasteful number, since it uses less digits than its factorization.

1388380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 272 counting only the distinct ones).

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

The square root of 1388380 is about 1178.2953789267. The cubic root of 1388380 is about 111.5585300028.

The spelling of 1388380 in words is "one million, three hundred eighty-eight thousand, three hundred eighty".