1388672 has 32 divisors (see below), whose sum is σ = 2917200. Its totient is φ = 656640.

The previous prime is 1388669. The next prime is 1388687. The reversal of 1388672 is 2768831.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147 + ... + 2717.

2^1388672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458600).

1388672 is an abundant number, since it is smaller than the sum of its proper divisors (1528528).

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

1388672 is an equidigital number, since it uses as much as digits as its factorization.

1388672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 592 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 1388672 is about 1178.4192802225. The cubic root of 1388672 is about 111.5663503419.

The spelling of 1388672 in words is "one million, three hundred eighty-eight thousand, six hundred seventy-two".