1388540 has 12 divisors (see below), whose sum is σ = 2915976. Its totient is φ = 555408.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388540 is 458831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34694 + ... + 34733.

It is an arithmetic number, because the mean of its divisors is an integer number (242998).

2^1388540 is an apocalyptic number.

1388540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388540 is an abundant number, since it is smaller than the sum of its proper divisors (1527436).

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

1388540 is a wasteful number, since it uses less digits than its factorization.

1388540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69436 (or 69434 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1388540 is about 1178.3632716612. The cubic root of 1388540 is about 111.5628152559.

The spelling of 1388540 in words is "one million, three hundred eighty-eight thousand, five hundred forty".