1388955 has 32 divisors (see below), whose sum is σ = 2396160. Its totient is φ = 685440.

The previous prime is 1388953. The next prime is 1388963. The reversal of 1388955 is 5598831.

It is not a de Polignac number, because 1388955 - 2¹ = 1388953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13434 + ... + 13536.

It is an arithmetic number, because the mean of its divisors is an integer number (74880).

2^1388955 is an apocalyptic number.

1388955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1388955 is a deficient number, since it is larger than the sum of its proper divisors (1007205).

1388955 is a wasteful number, since it uses less digits than its factorization.

1388955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171.

The product of its digits is 43200, while the sum is 39.

The square root of 1388955 is about 1178.5393502128. The cubic root of 1388955 is about 111.5739285972.

The spelling of 1388955 in words is "one million, three hundred eighty-eight thousand, nine hundred fifty-five".