1423231728 has 20 divisors (see below), whose sum is σ = 3676682088. Its totient is φ = 474410560.

The previous prime is 1423231709. The next prime is 1423231739. The reversal of 1423231728 is 8271323241.

It is a congruent number.

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, 14825283 + ... + 14825378.

Almost surely, 2^1423231728 is an apocalyptic number.

It is an amenable number.

1423231728 is an abundant number, since it is smaller than the sum of its proper divisors (2253450360).

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

1423231728 is a wasteful number, since it uses less digits than its factorization.

1423231728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29650672 (or 29650666 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 1423231728 is about 37725.7435712008. The cubic root of 1423231728 is about 1124.8429023104.

Adding to 1423231728 its reverse (8271323241), we get a palindrome (9694554969).

The spelling of 1423231728 in words is "one billion, four hundred twenty-three million, two hundred thirty-one thousand, seven hundred twenty-eight".