1388835 has 24 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 634752.

The previous prime is 1388819. The next prime is 1388837. The reversal of 1388835 is 5388831.

It is a happy number.

It is not a de Polignac number, because 1388835 - 2⁴ = 1388819 is a prime.

It is an Ulam number.

1388835 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388835.

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 23 ways as a sum of consecutive naturals, for example, 1890 + ... + 2519.

It is an arithmetic number, because the mean of its divisors is an integer number (114660).

2^1388835 is an apocalyptic number.

1388835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1388835 is a deficient number, since it is larger than the sum of its proper divisors (1363005).

1388835 is a wasteful number, since it uses less digits than its factorization.

1388835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427 (or 4424 counting only the distinct ones).

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

The square root of 1388835 is about 1178.4884386365. The cubic root of 1388835 is about 111.5707153285.

The spelling of 1388835 in words is "one million, three hundred eighty-eight thousand, eight hundred thirty-five".