1388488 has 8 divisors (see below), whose sum is σ = 2603430. Its totient is φ = 694240.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388488 is 8848831.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 47524 = 1158^2 + 218^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1388488² = 3855797852288, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388488.

It is not an unprimeable number, because it can be changed into a prime (1388483) 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 as a sum of consecutive naturals, namely, 86773 + ... + 86788.

2^1388488 is an apocalyptic number.

It is an amenable number.

1388488 is a deficient number, since it is larger than the sum of its proper divisors (1214942).

1388488 is a wasteful number, since it uses less digits than its factorization.

1388488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173567 (or 173563 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 1388488 is about 1178.3412069515. The cubic root of 1388488 is about 111.5614225848.

The spelling of 1388488 in words is "one million, three hundred eighty-eight thousand, four hundred eighty-eight".