1388538 has 12 divisors (see below), whose sum is σ = 3008538. Its totient is φ = 462840.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388538 is 8358831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 149769 = 1113^2 + 387^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38553 + ... + 38588.

2^1388538 is an apocalyptic number.

1388538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1388538 is an abundant number, since it is smaller than the sum of its proper divisors (1620000).

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

1388538 is a wasteful number, since it uses less digits than its factorization.

1388538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77149 (or 77146 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1388538 is about 1178.3624230261. The cubic root of 1388538 is about 111.5627616923.

The spelling of 1388538 in words is "one million, three hundred eighty-eight thousand, five hundred thirty-eight".