1623433728 has 80 divisors (see below), whose sum is σ = 4942808640. Its totient is φ = 463835136.

The previous prime is 1623433711. The next prime is 1623433753. The reversal of 1623433728 is 8273343261.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64743 + ... + 86246.

It is an arithmetic number, because the mean of its divisors is an integer number (61785108).

Almost surely, 2^1623433728 is an apocalyptic number.

It is an amenable number.

1623433728 is an abundant number, since it is smaller than the sum of its proper divisors (3319374912).

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

1623433728 is an equidigital number, since it uses as much as digits as its factorization.

1623433728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151017 (or 151001 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 1623433728 is about 40291.8568447770. The cubic root of 1623433728 is about 1175.2894963156.

Adding to 1623433728 its reverse (8273343261), we get a palindrome (9896776989).

The spelling of 1623433728 in words is "one billion, six hundred twenty-three million, four hundred thirty-three thousand, seven hundred twenty-eight".