43273728 has 60 divisors (see below), whose sum is σ = 124904208. Its totient is φ = 14423040.

The previous prime is 43273723. The next prime is 43273733. The reversal of 43273728 is 82737234.

It is an interprime number because it is at equal distance from previous prime (43273723) and next prime (43273733).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43273692 and 43273701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43273723) 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, 88 + ... + 9303.

Almost surely, 2^43273728 is an apocalyptic number.

43273728 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 43273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62452104).

43273728 is an abundant number, since it is smaller than the sum of its proper divisors (81630480).

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

43273728 is an equidigital number, since it uses as much as digits as its factorization.

43273728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9415 (or 9396 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 43273728 is about 6578.2769780544. The cubic root of 43273728 is about 351.0816280798.

The spelling of 43273728 in words is "forty-three million, two hundred seventy-three thousand, seven hundred twenty-eight".