1404728 has 24 divisors (see below), whose sum is σ = 2854800. Its totient is φ = 647712.

The previous prime is 1404721. The next prime is 1404737. The reversal of 1404728 is 8274041.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 1404697 and 1404706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 833 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (118950).

2^1404728 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 1404728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427400).

1404728 is an abundant number, since it is smaller than the sum of its proper divisors (1450072).

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

1404728 is a wasteful number, since it uses less digits than its factorization.

1404728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1404728 is about 1185.2122172843. The cubic root of 1404728 is about 111.9946851219.

Adding to 1404728 its reverse (8274041), we get a palindrome (9678769).

The spelling of 1404728 in words is "one million, four hundred four thousand, seven hundred twenty-eight".