43823161728 has 160 divisors (see below), whose sum is σ = 133451330760. Its totient is φ = 14267860992.

The previous prime is 43823161721. The next prime is 43823161769. The reversal of 43823161728 is 82716132834.

43823161728 is a `hidden beast` number, since 4 + 3 + 8 + 2 + 3 + 1 + 617 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43823161721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 396676 + ... + 494972.

Almost surely, 2^43823161728 is an apocalyptic number.

43823161728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43823161728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66725665380).

43823161728 is an abundant number, since it is smaller than the sum of its proper divisors (89628169032).

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

43823161728 is an equidigital number, since it uses as much as digits as its factorization.

43823161728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98366 (or 98345 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 43823161728 in words is "forty-three billion, eight hundred twenty-three million, one hundred sixty-one thousand, seven hundred twenty-eight".