1388838 has 24 divisors (see below), whose sum is σ = 3054744. Its totient is φ = 420640.

The previous prime is 1388837. The next prime is 1388873. The reversal of 1388838 is 8388831.

1388838 = T₄₉₇ + T₄₉₈ + ... + T₅₀₇.

It is a junction number, because it is equal to n+sod(n) for n = 1388796 and 1388805.

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 11 ways as a sum of consecutive naturals, for example, 231 + ... + 1682.

It is an arithmetic number, because the mean of its divisors is an integer number (127281).

2^1388838 is an apocalyptic number.

1388838 is an abundant number, since it is smaller than the sum of its proper divisors (1665906).

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

1388838 is a wasteful number, since it uses less digits than its factorization.

1388838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1929 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 1388838 is about 1178.4897114528. The cubic root of 1388838 is about 111.5707956624.

The spelling of 1388838 in words is "one million, three hundred eighty-eight thousand, eight hundred thirty-eight".