1623728 has 10 divisors (see below), whose sum is σ = 3146004. Its totient is φ = 811856.

The previous prime is 1623707. The next prime is 1623733. The reversal of 1623728 is 8273261.

It is a happy number.

It is a zygodrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1623728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50726 + ... + 50757.

2^1623728 is an apocalyptic number.

It is an amenable number.

1623728 is a deficient number, since it is larger than the sum of its proper divisors (1522276).

1623728 is a wasteful number, since it uses less digits than its factorization.

1623728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101491 (or 101485 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 1623728 is about 1274.2558612775. The cubic root of 1623728 is about 117.5360505044.

Adding to 1623728 its reverse (8273261), we get a palindrome (9896989).

The spelling of 1623728 in words is "one million, six hundred twenty-three thousand, seven hundred twenty-eight".